There are two reasons for businesses not taking up Bitcoin, firstly-volatility, the very large swings in the price make it difficult to price your product, for example; you produce an item which you sell for $1,000 now someone wants to buy with bitcoin and bitcoin is at $4,000 so you want 0.25 bitcoin for your product which you receive, next day you want to cash in your bitcoin but it has dropped to $3,000 so now you only get $750 of course the opposite can happen and you make a chunk of extra profit. But the fear of the downside is what is stopping adoption as most people are risk averse.  Secondly-high transaction costs with slow confirmation- a merchant taking debit and credit cards pay around 0.3%  to 1.99% in fees with transactions confirmed in seconds and with some providers the money is in the bank next day. Hence the slow and limited adoption of Bitcoin etc.