Crypto ELI5: What happened to Cardano?

I parked some money in ADA late last year. At that time, I got the impression that it was a hot project that was approaching its architecture deliberately, with an eye on long-term functionality and sustainability.

While the market as a whole has been very unstable, ADA just seems to have stopped moving.

Could you point me in the direction of a resource that explains what happened and/or is happening?

While I bought in with the recognition that I was placing a bet, no one likes losing money.

Thanks.