For plebs like us who don't have millions upon millions in capital, long term/low time preference/HODL is the only way to invest in Bitcoin.
That does not sound right. DCA works for everyone, whether plebs or not.
In order to prepare for UP, you have to get a stake in the game, and if you have no stake in the game, then you run the risk of FOMOing when the BTC price is going up.. so sometimes a bit of front-load lump summing can be a good thing, and just planning to buy for the next 4-10 years or longer, and reassess at various points along the way.
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What that post was suggesting/emphasizing was long-term/low-time-preference investing is much better for low capitalized plebs like me than a more active "trading" approach, which opens the pleb to more mistakes, more emotions which also opens him/her to further trading mistakes, and a negative effect on his/her general mental well-being.
For more well-capitalized, sophisticated traders, they could use more approaches to make profit out of the volatility they experience in different markets because they have the liquidity that allows them to make some mistakes.