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)?
If that kind of time you will hold etherium i think you can realy trust etherium because so many people bilieve in this coin and he has a very huge community already arount the world. Even me and some of my friend are holding etherium also for a long term trading.
ETH is one of the best coins for long-term holding. It has a good dev team, many supporters, strong community, so very safe for holding ETH, you don't have to worry your money will be gone one day.