I'm using non-custodial wallets to avoid fees and holding long-term, but I struggle with the timing. How do I balance being patient with knowing when to actually rebalance or take profits? As a young investor with a small portfolio, I want to avoid losing gains to fees or taxes, but I'm scared of missing opportunities.

I already have UnitedHealthcare PPO's 'Global Connect' and 'Gold Card' offering $150k medevac/$300k emergency medical, so for my Europe trip, should I purchase additional travel insurance?