If you have $100.00 as your total investment , what will you do , invest all in altcoins ? and which one.
From my opinion with $100 u couldn't invest in anything because the rate of exchange is too high now maybe you could buy some eth but the invest that you put there not optimal. If i were you i will invest on the new ico, most of ico sale their first token with some bonus and the token price some of them under $1. But you should analysis the ico first, will the ico have an opportunity to success or not because if not you will throw away your money without gain anything.
Try to catch very cheap alt coins like SC and invest your money 100 usd into that cheap coin. Whenever it increase very much, sell it and wait for it to get lower and then buy again. You can try this swing trading cycle to make a lot of money.