It is asked so much but there is only answer for me: hodl! you can do something else as well but the best way to survive is hodling. Sometimes even hodling may not be useful, you must lose everything to come back stronger sometimes 
One should note that Market is Volatile, anything can happen at any given time, for me the best or the key in investment is PATIENT, learn the market, you can join as a trader but take tall a lot your time for closed market monitoring, some would take HODL, but just the same one most have active monitoring and participation on the market trading, some still would go for Investment... Patient plus learning the timing to invest could give you a good result of investment.