One of the biggest mistakes on this list that many beginners make. Yes, you should have some exposure, but the riskier the asset, the more research you need to do not just upfront, but continuously.
As much as I find memecoins cringeworthy when they are reaching market cap of over $10B, $20B, or even $50B, I have conceded that allocating some money into certain memecoins will probably yield an insane ROI in the bull run.
I am keeping an eye on SHIB and FLOKI; I bought a bit during the dips (i.e. bear market) last year.
Not financial advice folks.
Graham Stephan is a notable exception. Hats off to him for what he has achieved and for remaining down-to-Earth with the general public.