i dont think he can get a precise answer here as this is a very subjective matter. and besides, the market performance of every alt is different from one another. and also, there's no authority that can tell the market whether it is alt season or not.
and if you are following specific coin, dont just look at the overall market because sometimes it has nothing to do with the market trend, but depends on the dev team themselves. if nothing is happening with their devt, do you expect them to follow the bull season in the market?
The market is the open place for everyone to do exchanges. Some will get profit and some will get loss. The same goes for the altcoin season that will bring profit for some people and losses for the others.
Altcoin season does not mean all alternate cryptocurrencies will have increases. Even if one alternate cryptocurrency rises, you can get profit or loss. You decide the price you buy it and sell it.
My simple advice is in this bull market plus the altcoin season, if you don't buy one coin at x10 price from the bottom, even buy it at price x2 from the bottom and see temporary loss, just hold it. You will have chance to take a draw and very high chance to get profit. If you buy at price from x5 to x10 from the bottom, it can be different.