If btc goes to 100k it will "only" have (more or less) doubled from its ATH.
From there it will need to rise another 100k in order to double again. I don't say this is not a good investment, but first of all crypto owners are spoiled, until up to now we were used to 10-fold, 20-fold + increases, so doubling the money has not been really special.
But this smaller reward ratio is paired with a much bigger risk ratio, since btc's swings in a correction period will also get bigger.
For hodlers who are in from the very beginning, it won't matter much probably, but where will btc find new buyers when it has reached 100k and needs to go up another 100k in order to double again in price?
And the fear of FOMO will also become smaller, as people will at one point accept, that the train has left the station.
Of course, should btc show convincing signs that it could reach 1 Million very quickly, then the whole picture changes.
To understand how BTC works, you need to look at the history of BTC development. History shows us that BTC showed new peaks in its price every four years, and after each such peak, its price went down for a correction. Now, everything is likely to happen the same way, by the end of 2021 BTC will show a new price peak and then go into a deep correction. It is worth noting that, no matter how it was, BTC is a high-risk asset, which has already made it possible to make good money, but also made it so that some investors lost their funds. With the rise in the price of BTC, there is growing interest for investors, as well as doubts about buying it. This is logical, since with a new peak in the BTC price, the risk increases.