I'll advise myself to learn from other experiences.  It is way more cheaper that way.  Do not instantly believe in Price analyst without verifying the truth behind and most importantly, I will tell myself to learn to hodl and not just get blinded by the instant profit presented upfront.  Patience is the key to Bitcoin's huge profit so I will remind myself to have patience.

I will also tell myself to be wary of centralized exchanges and never leave my Bitcoin and other cryptocurrencies for a very long time because it is frustrating to find out that the exchange holding our cryptocurrency shuts down or has gone rogue.  It is always best to keep or coins in the wallet where we have full control.