For me Bitcoin has been my 100% portfolio and up to this point, I am glad that I choose that part even though Bitcoin price has undergone a lot of changes lately, my BTC vs $ balance has shown green and also red-negative movements which is a pointer to the activeness of bitcoin volatilities.
Knowing that Bitcoin is volatile in DCA pricing and also having a balanced market that shows not too much of a sign, e.g. 50% price movement within a few hours which is a sign of pump, or a drop in price significantly below 50% which is a sign of dumped.
Bitcoin has a cycle to help calculate its movement unlike those altcoins that have high centralization, subject to pump.
Good for you OP, congratulations on your wins. Bitcoin truly is a good choice when you have a good amount of $$ to use as capital. Saves you from a lot of headaches. It is indeed volatile but not too much compared to other altcoins though, specially sh*t/meme coins.
While I think that going for bitcoin is a good choice, it would also be great if you'd try to venture into other altcoins as well and expand your portfolio for better opportunities in getting higher profit percentages. If sh*t/meme coins are still too much for you right now, there are also well reputed altcoins available out there that are not as risky. Afterall, placing all your eggs in one basket isn't really a wise decision.
Just always remember to create a different investing strategy for altcoins though, since altcoins are a lot more volatile that bitcoin.