so what's the minimal amount to invest and get about 5$ per day ?!
one way of getting those kinds of returns is by lending traders on bitfinex. you'll need about lend about 10,000 $ to get a a weekly return of 38$
bitfinex lending is very small profit, is not competitif investment in return
and bitfinex after case hack, down trust
and several clien gone from bitfenex exchanger