Crypto market are experiencing a flat period:

it would be hard to get substantial gain along those period.
An investment strategy can leverage the correlation among crypto currencies:

Usually coins with greater market cap have an high correlation.
The investment strategy during flat period should focus to the anti correlation pattern. It would be easy to identify coins that show
an inverse correlation and that can be used to speculate in the short period being able to gain during flat market.
Once you identify a couple of anti correlated coins the strategy will require to convert your pocket from a coin to the other when it decrease by a 5% factor and to convert back when the opposite occur. This way your money will likely not increase a lot but the number of coins will increase by a 5% market each cycle that will result in a big gain when market will increase again.
Based on the fact that your grow is based on the number of conversion cycles it would be suggested to not focus your pocket in a single couple of coins but at least on 3 different couples.
Start gaining now....