I guess what im getting at is ... should I sell altcoins when they reach a decent high (take profit or reinvest in BTC) or HODL with them with the hope that one day they might explode like BTC ?
Ones in question:
XRP
TRX
AAVE
XLM
ADA
EOS
FIL
DOT
Of course you can sell your altcoin when the price reach the highest price. That is for take your profit in the altcoin season so you can use some of the profit to buy back in the bear market. You can also use the profit money to reinvest in Bitcoin especially if you use DCA method.
I see you have a good altcoin which have a chance to increase in the altcoin season. We already see what happen to XRP and ADA and that will not stop to that price. The other coins in your list will be waiting for the right time to increase so you should be patience.