You wont get profit if you invest 100 usd, forget about it. Go buy some altcoins and start to trade. Learn more and trade more, if you will be doing all right , you will get succes. Good luck dude
Well you can have a good profit when you invest in litecoin. You get the double back and you get way more coins than investing in a stronger coin who is expensive most of the time.
You can also earn the altcoins mostly. By doing signature and aidrops etc...