@philipma1957, 7% per year doesn't look bad, but even if I invest in 100 SOL and start staking them today, the profit I would make is very low for me personally. On the other hand, if I had $1 million to risk, that 7% would be around $70 000, which is definitely a nice amount, especially if you don't have to do literally anything.
This is the reason why the rich are always at an advantage, they invest only excess money and invest a lot, so even this kind of interest brings them a small fortune.