Am I being dumb?

I’ve been buying BTC via Robinhood for a long time. I have about $75k in at this point, am I an idiot for keeping it in Robinhood? It’s just so incredibly easy for me to purchase and DCA daily - I also use it for my “fun” investments into other stocks. I know the best is to have it on a physical copy somewhere but that just sounds insanely complex and I’m worried I’ll lose it or forget password or something. Any thoughts?