Your question implies that I retain my experience from nowadays, otherwise, I'd probably repeat a lot of the past mistakes.

Recently I discovered some BTC transactions I made on Coinbase in 2015... Didn't even remember I had BTC back then. Of course, I sold, haven't bought it.

What I would change would be to get into crypto with an open mind and research it deeper much sooner. That implies being on the ancestor of Hive earlier too. Seems I dabbled with crypto early enough, but didn't take it seriously for a good while.