You mean this
Celsius project? I'm not one of the investors but seem legit.
Its been created since 2017 and it seem to have lived still after the long bear market. I'm not sure if they are worth investing but if they have been here still after this havoc strike. I'm damn sure they still can be here. Its still listed in few exchanges.
that kind of project can run even 5 years since they are only giving small interest for investors.
If they became scam someday no one knows but its possible. as long as your money is not on your hands its not safe and its not your own so don't stored it there for long terms same thing when you hold your balance in exchange same risk.
If you really want to Invest and try just remember that don't put all your money in one investment so you will not be broke if one day that investment will turn to scam.