Is to cash out (some of) your altcoins to BTC when mania occurs.
Seriously, I’ve been there. Mid 2017 I invested in some shitcoins I believed in and saw my portfolio skyrocket by the end of the year. As a beginner, I got used to the green, thinking I would be a millionaire in a few years. Eventually the market crashed and I lost all my dollar gains. Thing is, my portfolio is now worth twice the amount of dollars, but half the amount of bitcoin since that peak.
This will happen again. More dollars will be printed and less bitcoins will be traded. So if there’s one tip I could give y’all: also track your portfolio in bitcoin and convert some of your altcoins to bitcoin when it’s BTC ratio skyrockets.