If you're a Bitwarden user and this doesn't worry you, you haven't been paying attention to the history of almost every company that has accepted VC funds.
It doesn't matter how well intentioned the founders are - once you accept that kind of money, it's not your product anymore. You are now in the business of making money, nothing else, and those skewed incentives will start bleeding into their product and business practices sooner or later.
As a company, Bitwarden has been a huge role model for me, and I hope they'll be the exception to the rule. But $100M is a lot of money, and I simply can't imagine it having a net-positive effect on the company and product. But we'll see...
For anyone looking for a bootstrapped, open source alternative to Bitwarden, check out Padloc:
https://padloc.app/ https://github.com/padloc/padloc
(Disclaimer: I'm the founder)