Where to invest 7k usdt
To get profit daily 30$
With that amount allocated for trading $30 profit daily is very easy even in Spot markets just snipe some tokens that has a potential to move upward then sell at high always do the buy low sell high method, you can select coins that has either good news or down for atleast some days and wait for reversal.
but if it's like that he won't get daily profits, because he asks for daily profits then staking is the best way, but with capital of 7k$ I think it will be difficult to find apr with high safety. maybe you can get it on a risky coin like trb.