Hey,
A lot's of sites are working over online to earn btc. but none of those are trusted l think except a little bit sites.
So, I wanna know how many the best trusted sites have to earn btc safely in long time.
Please response the oldest of bitcoin.
Really depends on how high an income you are expecting, and how much time you are going to invest, and your capital to begin with.
Seems to me you're hoping for something like a faucet where you can get free coins with 0 investment? Yes sure, but you won't be able to get a substantial amount of coins in this way.
If you are willing to invest more time or money to work out a passive income stream, there are many viable options such as trading, investing, affiliate marketing, or others.