Can i trust on etherium project
I want to hold it for long term 5-10 years
Can i use hardware wallet (ledger or trezor)?
Of course, I believe ethereum is for long term. It is one of the most trusted coins in the crypto world beside bitcoin. Its community has fully supported the development and those that support them solidly did not leave no matter how the price plummet that much.
I agree with you very much if we talk about ethereum I think that there is no need to doubt and indeed ethereum is very good for the long term so we don't need to hesitate if we want to invest ethereum