After a long decline in price, many have understandably grown weary and abandoned the plan (even if they successfully used it during the last bull run).
No reason to do this. If followed rigorously, the plan caused selling some bitcoins at the top, and remember that it expressly forbad to buy them back even at the cheap prices that followed.
Certainly, I believe that there is considerable value in planning ahead and even having some kinds of concrete plans that are NOT going to cause you to panic at the wrong moments. However, sometimes, there also needs to be some flexibility because no market system is going to follow any mathematical formulas with precision because there are humans and manipulators and politicians involved.
I think that you are correct that a lot of previous bulls are becoming weary of bitcoin, and it will be interesting to see whether they start to buy back into bitcoin if it goes above $500 and then continues upwards and maybe by the time they buy back in (if they do) then BTC prices will be back on a downward trajectory (ups and downs that are NOT easy to predict or contain by many manipulators while they are happening).
Yes, I understand the concept of rake and then to keep your rake or to diversify your rake (and NOT to buy back in); however, sometimes modification may be practical and necessary, especially if an investor knows that the price is going to come back up, but in the meantime the price is being manipulated downward. In those kinds of circumstances, a person can sell part of his BTC holdings and buy back in for larger holdings. NO that practice is NOT clean, and it is NOT mathematical and yes it takes judgement and guesses that may result in the investor guessing wrong and missing out on gains that he could have had.
For those who only now come to BTC (or whose cost basis is <500 otherwise), the plan is still very good because bitcoin continues to be an asset with a limited downside (zero at most, -100%), but with an unbounded upside, (+100%, +1000%, +10000%). The correct way of investing is unchanged: select a small but significant enough of a stake (not 1%, not 50%+, but something in between), buy it in a quick order (DCA is a flawed concept in this style of investing), and set a rake schedule that suits your preferences.
Yes, dollar cost averaging (DCA) is a bit of a different practice from what you are proposing, but DCA is NOT incompatible with concepts of raking profits. DCA can work with any investment and it can be more assured way of investing rather than a balls to the walls alternative.
DCA is a tried and trued method that anticipates that in the long run, the asset will be going up in price, or at some point will return to an upward trajectory. In that sense, DCA works with every kind of investment, except for those that never return to an upward price trajectory.... but even then, a fairly strict DCA practice may allow an investor to discontinue investing in a depreciating asset that does NOT appear to have any recovery in its future.
Actually, there are fairly new investors within the past 2 years that could hold a sizable quantity of bitcoin and have cost bases anywhere between $0 and $2,000 - likely most of them that merely bought at various points and hold will have cost bases largely between $220 and $700. You will have cost bases outside of the largely $220 to $700 when you either got unlucky or lucky in buying outside of the range or you engaged in failing or or successful trades.
I see no real reason for a person to NOT continue to buy and to accumulate at this time, and DCA allows someone to continue to invest a certain percentage of his/her income while continuing to have the income coming in. Normal people do NOT usually have large chunks of money to invest but instead have a stream of income in which they can DCA and/or invest and spend wisely by living within their income stream (rather than beyond it).
Your suggestion to take a stake between 1% and 50% seems to be a bit broad, but instead more feasible that someone figures out their income stream and their expenses and then figure out ways to live within their means by investing a certain portion of their extra money (or extra that they have created by frugality) to invest in Bitcoin. Then the rake concepts will apply as BTC prices appreciate and that they are able to monitor that BTC prices can move fairly quickly in order that they can act (to rake) at more or less the preset BTC price that they have established.
Also, surely, let's say for example that at this time, a guy's average cost basis is $500, and at this time he decides that he wants to begin to rake at 2x 10% and then continue to rake 5% thereafter at every 1.5x. If he discontinues completely to invest in BTC, then his cost basis will remain at $500, and it will be easy; however, life in reality and the reality of normal people is NOT so easy. It is likely for a variety of reasons that his cost basis is going to change through time, whether he buys more BTC or he sells BTC.... The guy(gal) likely has an income stream in fiat, and may want to continue to periodically invest in BTC... or through time, a person may also develop part of an income stream in BTC, which may cause some of the cost basis calculations to become a little more complicated to clarify and to keep track of.
For those who emotionally cannot handle a 100% loss, I would add a (mental) tweak: Invest 50% of your net worth to a basket that contains 10% of BTC, 10% of Monero and 80% of cash. When the cash is distributed wisely (in different currencies, jurisdictions, and banks, with some tucked in your mattress), it is pretty safe. Then you maximum loss even if BTC and XMR both go to zero, is -20%. That's pretty manageable, isn't it! The upside is still there.
This is very incomplete advise for real people. Surely some people may want to follow these kinds of formulations; however, in the real world, people get involved in all kinds of investments (even yourself), such as real estate, precious metals (PM), other cryptos, the stock market, bonds, family business, etc.
Your point about diversification is certainly valid, and your points about considering net worth, available income, liquid assets and percentage allocations to direct towards each area are very valid considerations that are going to play out differently for each person and their risk profiles.
Certainly, some people could put 5% of their income stream into BTC; however, that may entail less than 1% of their total assets and maybe even less than .5% of their liquid assets.
Surely it is a good thing to get a grasp on these various concepts in order to plan how you are investing and risks that you are ready, willing and able to take and when and what points you plan to rake and to either diversify or to use the rake for life enjoyment, rather than reinvesting.