I assume it's 4k USD in Bitcoin. btw I don't think you will get an investment site where you can make $100 profit daily. If you want to invest, I would suggest investing in some trusted casino site that offers people to become investors. For example blackjack.fun, they have ways where you can invest your coin, They are paying your profit every hour. Yearly Profit 15%. According to your demand, it's really smaller. But a way of making a sure of profit. But if you are a gambler you can keep the fund in your blackjack.fun wallet while you are not playing to get profit. You can unlock/withdraw it anytime you want.

On the other hand, if you have a good knowledge of trading, you can do it. You can do even more.