Hi there!
You could do that but these coins wont go x2 soon i guess it will take alot to take those x 3 or x4, it could be years.
You could invest in a coin that has Masternodes or at least proof of stake (POS), this way you can earn a passive income for validating network transactions etc. Check out POW/POS on google and learn about it, it could be your next hit!
Always do your own research!
Greetings!
