stay calm and do not invest the sum you can afford to lose. Crypto = VC investment in terms of risk!
The Best way and the most reliable one - find the gems (fundamentally strong projects which have strong team, a product in the mind to solve an important issue with high utility value). Ideally, it should have a reasonably deep moat vs. competitors. This is the recipie for success! Earlier or later the market will recongize the value of the project and will award you with immence profits. Real life example, RLC token (iExec) >+100% today! This pick was included in our portfolio yesterday and published here https://steemit.com/crypto/@p2port.com/crypto-portfolio-high-quality-crypto-assets-for-long-term-growth-created-on-11-january-2018