Why does it have to be a Crypto currency based business?
Because if start a business in real life with fiat, earning potential is less. Crypto business will give me return in crypto only and crypto price in future will further improve that return
You are missing the point, you can still convert all or most of the fiat you earn through this fiat based business into Bitcoin and still pay your
manager and other expenses in fiat and then decide how much of the rest of the money would be converted to Bitcoin. Remember there are a lot
of regulatory rules and regulations that you need to adhere to for any business and in most countries Bitcoin has not been accepted as a currency
yet, so you will have to find ways to bypass this to be able to run your business. We have not even touched the tax regulations yet and all the
labor issues that you would need to deal with. Take some of those coins and deposit it in a site like freebitco.in where you get a 4.08 annual interest
rate, which would give you about 0.00657534 BTC/Day or 0.19757397 BTC/Month or 2.44830352 BTC/Year at today's price. (very high risk, but
you still keep all 60 coins in the end)