1% daily trading with $170 - When will it get hard to achieve 1% daily profits?

Hi there, when finally saw the potencial in crypto I started to hold my coins, and I was very reluctant to trade or even spend my coins, because I realized how much money I was losing over time. I know avoid spending as much as possible, but I decided to allocate a very small amount to trade. I see it as a game, and I want to see how far I can go.

I don't have a good trading background, and I only did sports trading when I bet at Betfair, and I am now applying the same basic concepts in crypto trading. I'm scalping the market trying to explore the big variations in price. I'm only trying to gain around 1% a day, and I always use my entire stake. I started with $170, that is of course a very small amount.

So my question is, when will it get hard to do what I do?
With $170 it's really easy to get my stack matched, and with the price variations I have no problem getting 1% daily profit out of my trades. I started 4 days ago and I now have $180.

If I keep this up I would be doing 30% a month, and that is huge, according to what I read from other traders, so does this mean that if I try to do these trades with higher amounts of money it will get harder? If so, why is that? Is it because my stacks will not get matched so easily, and I will need to be exposed more time, and won't get my trades finished in just one day?