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 you have a strong faith on cryptocurrency then you will take for long term decision. You know that ETH is topmost popular coin after BTC so you can hold it till 5 years and i believe that after end of 5 years you will get 10 to 20x profit.