My thought is to play with 3-5 coin a day for easier to monitor, I think if I start in about $100-$200 will be a bit useless if the coin i play have a high value (even it dump). If I play with cheap coins, when the price movement is low, it makes no difference.
How do you figure? One of the great things about spot crypto trading is that bitcoin is divisible down to 0.00000001 BTC, so it almost doesn't matter where a full coin is trading. Let's assume you're trading on bittrex which has a 50k satoshi limit for smallest position size. At current rates that's about $3. Even with a $500 stop loss you're only risking about $.30
As for low price movement, yeah compared to BTC, XRP (for example) isn't exactly tearing up the charts but to go from $.20 to $.22 is still a 10% move. Also, you can still make money in range-bound markets it's just a different strategy that may (or may not) suit you.
As always, YMMV.