I'd hold and not trade with altcoins. If btc price spikes while holding altcoins, you'd lose most in not all the profit you made trading. Just my opinion.
Either case, $100 is too little. Should increase your funds
Either case, $100 is too little. Should increase your funds
I guess $100 is already enough for making money with it. You can invest into trading or if not you can hold that $100 value of btc.
Even without effort you can earn if the price increase.
And you just need to wait for further updates of the price increase like bitcoin halving.