Depends.
A waiver could be requested depending on the amount.
True, but there are two parts to an approval of a waiver; one is being without fault and prompt reporting is helpful to establish that. But also if you knew or should have known that receipt of a settlement would cause ineligibility, then fault can be harder to establish.
The second part is ability to repay. If you have the funds from the settlement, you have the ability to repay, even if you are without fault.
There is also an administrative waiver if the dollar amounts are low enough.
The original poster should do what they want to do with their money, but since SSI is needs based, SSI will most likely stop. $10,000 is a nice chunk of money but it is hard to live on a long time and pay medical bills. $100,000 is a nicer amount, but without other income or assets, it is not enough to generate an income sufficient to live on the rest of your live. $1,000,000 could be invested in a way that would provide a decent annual income, but if it is just spent, like so many lottery winners do, it will fritter away and be gone in a very short period of time.
How much money? Are you going to invest it is something safe or go on a spending spree and give away fistfuls to everyone with a hand out? Saving it would keep you off of SSI but then you would still have the money with no SSI Big Brother looking over your shoulder. Also means you are on your own in terms of being supported.