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 yes,Long term investment in Ethereum is a good idea because Ethereum is the most demanded cryptocurrency today which is highly profitable.Ethereum is not just a cryptocurrency, but it is also a platform to that helps to create blockchain based softwares, and thus ethereum will never come to an end.