If Only I Just Put It All Into BITCOIN

So towards to end of 2021 I made (for my doing) a lot of money over 300k. I can remember that at one point I could have made over more than 4 whole BTC if I just put everything I had in altcoins into BTC.

Of course I didnt do that but cashed out a small bit (not nearly enough) and kept investing in worthless altcoins. Now Im not even able to buy a third of 1 Bitcoin of what I have in altcoins now and I feel like an idiot.