Thats kinda hard to predict when the bull market will comes.
Living my first bear market is actually teaching me to take profits in the best bull market without thinking "I'll wait for the bull run ATH".
I will probably begin to sell my fractions of BTC and ETH when they will reach the previous ATH.
Take your time first to think about everything before selling what you're holding just because you see the prices surging, ATH may bring good fortune to those who got the patience to hold in the bear times but I suggest that if you don't have any rush needs or some plans ahead, just hold it until the next ATH will come so that you can acquire more profits. Just take a little bit of what you've earned because as you've said, this is your first bear market. Anyway, it's your option because it's your own coin.