The best thing to do is to accumulate as much bitcoin/altcoin you can during the bear-market. The market will never fall forever, so take it as a chance to buy crpytocurrency at a cheaper price. Be patient, never look at the short-term view of crypto market, always look at the long-term potential of it, the development, mass-awareness, and mass adaptation as time goes by. Also, do not forget the lessons and experience you have gained during the last bull-market up to the point where a lot of people have lost money in the recent bear-market. Never commit the same mistake.