I would invest in something that has a chance to become big in near future, like AI or AR/VR.. Maybe FileCoin, ARToken by Cappasity..SONM.. Hope all three of them aren't scam..And want to believe the price will soon grow significantly.. does anyone know are these good and promising projects?
I just suggested above what you can invest, but you have to keep at least 1 year. The best altcoin are not pump & dump but have projects, road maps that take time and patience to be developed.
If you have time and patience, and money, then you can invest in solid coins and already present for more than 1 year:
Stratis - Lisk - Wawes - Monero
or on young and promising coins that can explode and become rich:
DeeoOnion - IxLedger - OmiseGo - Qtum - Patientory