The sad thing is there ARE quite a few legit alts out there but they can never grab a decent market hold because people would rather buy the weekly scams than invest in something good.
The answer is the time. many people don't want to wait for a long time to make profit. Just buy newly launched crap coind and dump immediately after it has value. Compare to good & legit alts which need more time to established and grow in value. That speculator just want to get profit quickly 