The content of such tweet comes off as a kind of gambling mindset to me - unless we dumb down the meaning of "expectation" to $20k "might happen" rather than seeming to imply some kind of certainty that $20k is inevitable in the minds of HODLers.
I have stated several times that bitcoin still is performing well if it can average 6% or more of appreciation per year, and there is not even any guarantee of that.
Of course, we have outlandish, and even decently probable expectations of $350k in the next 3 to 5 years, so sure we can add up all of the scenarios of downside and upside, and even start to believe that $20k is a kind of given (and conservative) scenario, but still seems like a gambling way of framing "expectations" to me to be counting chickens before they are hatched.
On the other hand, i don't have any problems with bullish or even investing a lot into bitcoin in the event that financial matters are somewhat in order. For example, if I were in my 30s or 40s, and I have had accumulated more than $100k in wealth (meaning that other matters of my finances are in order and I have that $100k in wealth in traditional investments, and not bitcoin), it would be foolish of me to not have at least 1% of that value in bitcoin, but I would suggest any "normal" person in their 30s to 40s should have a life expectation of at least 10 years, and even 20 years or more is realistic, and would be prudent to put 1% to 10% of his/her investible assets into bitcoin, so long as his/her other financial matters are in order.
1% is conservative and 10% might be considered to be a bit more on the adventurous side.
Surely, investing more than 10% would be more risky, but would not be totally irresponsible or out of normal prudence, especially if the person otherwise has his/her financial matters in order, including having quite more than $100k of investment capital accumulated, and enough cashflow and reserve capital to be able to live 6-18 months in the event of one or two emergencies.
In other words, the more that a guy/gal has accounted for other various expenses of his/her life, then the more that such guy/gal can reasonably put into some asset that would be considered more risky (because his/her other financials are in order).
Of course, I am an advocate of investing aggressively into bitcoin because it does seem to be a phenomenal asset, but I am not an advocate of either gambling or taking upwards BTC price movements for granted.