If you're going to constantly make profit then you could even start with as low as $10 and end up with hundreds and thousands in no time.
This is totally false. You'll spend more in transaction fees than the $10 you're trying to trade.
Well, it completely depends. Is it likely? No. But is it possible? Definitely. If OP constantly and accurately bought the correct pumping coins then it's definitely very possible. OP didn't specify if he was planning on doing day trading or somewhat longer-term trading to start with.