Understanding the trend of market is one of the important thing in crypto trading, we have to enter in to this market when bullish trend only. Use risk management is second important thing, we have to use stop loss and trailling stop for each trade.
But let me get something right, isnt the bear market actually the right time to enter market and accumulate much coin as much as possible before the bull trend because during bull trend, price would have been too high for any investor to come in at that time, just like the bear market we just witness.
Though I am not sure if we are fully out of it, it was when market went down that many people started buying coins against the bull market, except what you mean is that it is best to trade during bull trend than bear which I equally agree with that because prices tends to fluctuate a lot then which will be a good point of entry for good traders.