Hello, i do not know if it is possible to have a loan of 3 btc for business, and i am willing to be offering the lender 5 percent of the company profit on a monthly basis for the next 3 years while i also pay the loan back in full.
That's not how cryptocurrency loans work. Until legal and contractual gaps between crypto and fiat are closed you're not likely to get a loan with a business contract as a guarantee. Try a bank or local "Hard-Money" loan broker.