Good advice.  I'd add:

8.  When prices begin to drop, don't try to hedge by buying altcoins.  Bitcoin preserves its value the best.  During the last crash Bitcoin bottom at a maximum decline of 85% but many alts crashed 99%.  Remember, you cannot beat the market, and you don't need to.
9.  Don't try to hedge by selling your bitcoins for USDT, USDC or any stable coin.  Doing so will typically tie you to an exchange, and you may end up losing that coin.