Bill Hwang had settled insider trading charges a decade or so before he caused 30 billion dollars of liquidations after engaging in multiple forms of financial fraud. His insider trading punishment was likely lax and he committed crimes again, causing even more economic damage.
18 years in prison is nowhere near the amount of economic damage he caused. He amassed a net worth of 10-15 billion dollars. That's ten thousand average lifetimes worth of average American work. The punishment should reflect that. The expected value of fraud should be negative so that not even a degenerate gambler would consider it.
Can you explain your views as to why incentives to harm the economy massively via fraud to benefit yourself need to exist?