I can’t think a proper strategy that can work for everyone in crypto market. Everybody has his own way of investing in the market. But some general tips can be research properly before investing in any coin about the team of developers, price trends, etc, don’t be greedy for earning profits, never invest more than what you cannot afford to lose, and don’t panic and have control on your emotions.
And just to add, just invest from your spare money like don't use the money that you think you need for daily living. So if things didn't work out the way you expected you won't be depress about getting a quick profit. Always think ahead and don't be impulsive in everything you do.