Not that I've been here long, but to me it looks like there's gonna be a flood of alts over the next year or 2, with a small number of them being successful.
To gauge that success you will need to do research on what the altcoin offers that is different from others, who is working on it, what type of base they have etc.
Out of the coins out there, Im not sure which will rise. But Im certain altcoins will be a good investment for the future
 Exciting unknown times ahead!