Of course $100 investment is worth it. If you take $100 and do 1 trade everyday and make a 1% profit then re-invest everything you've made and do that everyday for 2 years, you'll have over $1,000,000. Compounding interest really adds up quickly!
That's the theory. And it never goes 100% as you want.
$100 is not much, better to buy very low priced altcoins that can double fast your investment...or half your investment.
do not agree, the price does not affect, the main thing is to find promising alts with a small capitalization