when you ask this kind of question that means you shouldn't be trading. because the first rule of trading is that you should trust yourself and your own experience not others say, specially on a forum like this that everyone is lying through their teeth to get their altcoin pumped
![Cheesy](https://bitcointalk.org/Smileys/default/cheesy.gif)
So do you see any one of these, especially where they are right now, giving me 25-50% profit in a couple of months?
these are in a bubble, which means they have a bigger chance of giving you -25% to -50% negative profit (aka loss) instead.
instead look for something that has not been recently pumped and it is in a big dip. preferably for a long time on a low price.
let me put it this way for you:
on one hand you have Ripple and Monero and some other big coins that have recently been pumped. they may go up but there is a bigger chance of going down. and even if they go up they can not go up much.
on another hand you have other altcoins that have not been pumped yet, so there is a bigger chance for them to go up and if they go up they go up >100% but there is also a chance of them to go lower but smaller chance.
now you choose which hand you like more.