Bear market dose not matter just keep holding,Those who really benefit from cryptocurrency are those who get in for long term. on the first of January 2016, those who had bitcoins knew the value then was around $400 and by January 2017 1 BITCOIN was $1000, which is over 100% gain. looking at this, selling would be the best option , but holders won .

Also note that cryptocurrencies are very volatile, its very possible to make 1 million dollars from $100 or $10 in 24 hours and also VERY easy lose that 1 million dollars in less than a minute, so invest into cryuptocurrency with money you can afford to lose and make proper research before buying into a any cryptocurrency and don't sell off too easily.