It is hard to pick absolute bottom in the high volatility crypto market. Prices are close to bottom range so good to buy dips in some top altcoins while waiting for next rise.
It is not clear bottom in the altcoin prices, the yearly lows are still far away from the current market price, the bottom range can be observed if you check the higher time frames. If you looking at the 4-hour charts on the trading platform, the main trend can be hidden in small price bars.