IMO the optimal strategy is to actually keep everything in Bitcoin, because not only it's the leader of crypto market, it's also technologically the best coin. Diversification makes sense when there are close competitors, but there is no close competitor for Bitcoin. If Bitcoin fails, alts most likely will sink together with it.
Partly agreed cause I believe there are other coins and projects that worth it to invest with. Yes bitcoin is the leader but as an investor, I think its also wise to see some opportunity aside from btc itself. Yes there are no close competitor but there are other project out there that can be worth than investing all in on btc.
I have btc and some othet alts and I could say that some of my alts are much gain profit than my btc. So i dont think we could say its stupid to invest on alts, cause actual scenario and result are shown that some investment on alts are worth than btc.