Now thats a lot to me but after taxes, agent's cut, living costs, etc I doubt there'd be enough left over to invest to turn it into real wealth
Her role in Suits was only one job. As a very successful actress she was also appearing in films, doing PAs, speaking engagements, endorsements etc and at the time she gave it up to marry Harry she was still on the up. I saw her personal fortune estimated at between $5m - $10m and on an upward trajectory. Interestingly I saw the higher estimates in the US, the lower estimates in the UK tabloids.
So no billionnaire but if she was marrying for money there are plenty of wealthy men who don't come with the circus.
She also had to earn her own money, rather than being a trust fund kiddie who could lurk around waiting for her potential partner to make his mind up.