I was watching one trader yesterday, he lost 350k$ because he shorted bitcoin.
To make 7000$ out of 100$ I think it's possible only with meme coins in a short term. But the possibility that you will lose your 100$ is very high. Just don't ever invest through pinksale - it's a scam place.
if you compare it to catching a knife from a height, you might get injured and you might catch it perfectly. However, meme coins and other rapidly rising and falling coins carry a high degree of risk. Can get rich with only $100 and can lose it all. Whoever enters early will get the profit, but whoever arrives late will only buy above and suffer a loss.