The ATH of Bitcoin is $69k and price is still below this price. Until price breaks this high, we are still at a good price to buy. At $35k, Bitcoin have offered 50% discount to anyone who buys now; this is simple mathematics. Whenever there is any bull run, the first target will be the ATH, this will already put those buying now in 50% profits.
Your math on the way down is correct, but your math on the way up is not correct. Let's look at it.
ATH $69k,
Current price $34,500 - 50% drop in value from ATH - however, ATH = 100% increase in value.
That is ONE of the interesting things about math including the non-use of leverage, the most that we could lose is 100%, but there are a variety of scenarios in which we could end up making more than 100%, which has already happened multiple times in BTC's history and likely to continue to repeat itself.
Anyone who bought BTC below $17,250 made at least 100% when BTC prices went above $34,500, even if they may well chose not to cash out much if any of their BTC, then they end up having options, but they also start to experience more and more the power of exponential growth (and the power of compounding).. because the next doubling, if it ends up taking place to $69k, would end up causing the one who bought below $17,250 to have at least 3x in profits and 4x the original amount.
Those who were buying in 2015 may well have fairly easily gotten bitcoin for around $250, and so now every time the BTC price goes up $250, their BTC holdings goes up by the amount of their initial investment - and surely if the BTC price keeps going up (no reason to really believe that it won't especially if we might be looking 4-10 years or more down the road), then $250 changes in the BTC price are likely going to be like pennies are today.
I remember in 2015, I would set my sell orders in $5 or $10 increments, and then I would have a spread of $20 or something like that, so I would buy if the BTC price dropped $10 below my sell amount, and my friend was laughing at me because after fees, I was making like $0.16 or maybe $0.48 of free BTC on each cycle of an order, and so I said that I was just practicing to make sure that my system worked, but if you think about the BTC price currently being around 140x ($35k / $250), so the amounts go up proportionately, and sure maybe even practice might have gone into real play and included some more increases, but it still could end up in free BTC, if they are set up in a way that are somewhat neutral to BTC price moves of buying on the way down and selling on the way up, but selling in such a way that you never deplete your BTC holdings...
and likely these kinds of techniques should ONLY be applied after a person has reached his/her BTC accumulation target and perhaps exceeded the target amount, so there is freedom that comes from being in profits (even 10x or 100x or more) and being overly-accumulated in light of the target.. but then what is the target?, how many BTC is enough? It could take 15-20 years or longer of investing to get to that level, and surely some folks are coming into bitcoin after already having had built up their investment portfolio in areas outside of BTC, so they may well end up being closer to reaching their BTC target accumulation level as compared with someone who might have just gotten into bitcoin and even someone who had ONLY been in bitcoin less than a whole cycle (which so far has been considered 4 years for each full cycle).
The price of $35k is not too high compared to the possibility that bitcoin could reach above $100k. There is still plenty of time to buy when the price drops but it depends on one's plan. Dip has provided the advantage of buying at low prices but there are still many people who don't want to use it. However, if they are willing to buy with their budget, they can accumulate more bitcoins.
Perhaps what is even the need of always waiting for the dip before accumulating when you that even if the price of Bitcoin dips we cannot even accumulate a reasonable amount of Bitcoin due to how small our investment portfolio is so I see know reason why price dip should be a determinant of how we can accumulate.
Actually I'm not disputing the fact that buying the dip doesn't have an advantage but what I'm saying is that irrespective of what the Bitcoin price maybe be now shouldn't be a barrier to your plans of accumulating Bitcoin because just like we saw the price movement consistently on the uptrend this period there is every possibility of the price surpassing the all time high after the halving, however that's when you will realized that you had missed a great opportunity by not accumulating now.
Just as there is no point in getting intelligence after a burglar escapes from home, investing now without holding it deeply is really pointless in regretting it when the price of Bitcoin hits record highs in the future. It is better to take time and use every opportunity. Every opportunity that comes in life should be utilized. Never miss an opportunity, I think those who miss an opportunity are far behind in achieving success in life. Investing and holding deeply has substantial benefits. Perhaps the non-retainer did not fully retain his investment. I would tell him to hold his own investment deeply before making such comments.
To the person who says that holding on to a deep investment is not good, I would say that you invest first and plan to hold that investment for a long time. If you can meet your target, you will later say that the benefits of investing in deep holdings cannot be found anywhere else.
The deeper an investor holds his investment, the more likely he is to make a profit from that investment at the end of a certain period of time. Investing must be for the future, investing must invest in our deep plans
It seems that I had given some seemingly pretty realistic examples of the benefits of ongoing and persistent buying that likely beats out the waiting around kinds of strategies, even if the average cost per BTC might end up being higher for the one who is persistently and consistently buying, but s/he may end up with many more BTC, and sometimes even multiples more BTC than the one who was fuckign around with waiting around and not acting.