Day trading Cryptos are good if you understand technical analysis but I would suggest that, its not good to day trade now in this marker condition as things are not stable at the moment. Invest and hold is a better strategy in this market condition
Day trading is the best option at the present time, you can see that bitcoin prices are constantly fluctuating and refining strongly over the past few days, so to be profitable with little risk. I believe you should trade the day. The market is bearish in the long run so the bitcoin price will probably decrease at any time so when trading you must always keep track of bitcoin prices.
I agree, the volatility is so high that some call 2018 the year of volatility, that makes it ideal for trading. But still many people get burned as daytrading requires a ton of knowledge and experience. Picking a soli project and ride the bear out is way easier.