Did you forget to look at this site? https://coinmarketcap.com/ there are lots of good coins listed there and one of them could has a potential to get if not the same then close to the growth what bitcoin achieve.
There are so many people acquiring the top alts especially on those listed at top 2 and 5(excuse USDT in that list).
So the only thing people doing is the monitoring of the growth of those tokens and some is starting to accumulate to see if there would be a changes to come then see if they can earn huge once there's a big price increase will happen.