Dude I seriously doubt any credible business is accepting cryptocoins with the intention of holding them as an investment. You are missing the bigger point here. They can accept crypto and save HUGE on transaction fees. A lot of businesses pay a few % of the transaction toward visa/mc/amex etc when a customer uses a credit card. With crypto, they could pay almost nothing (just what it costs them to exchange the currency to fiat, which should be a lot less than their credit card fees.) Also they can potentially increase their sales by accepting any additional payment method...that is why businesses take credit cards, food stamps, etc rather than only accepting cash.
At least in the US the power I see in this is not transaction fees. With it still being federally illegal and the standpoint possibly changing with the next president many people do not want transactions with known retailers on their records. They would prefer to deal in cash--which supports the idea of crypto. Going to an ATM before a shop is not an out of the way transaction. This is a risk to the seller as they have not only product to be taken, but large amounts of cash(say in a coordinated robbery). But with that cash you are considering crypto fees vs no fees as well.
The other side of that is, these are budding businesses, just opening with huge investments that are nowhere near paid off. To take something that could plummet in value tomorrow is dangerous. Also, the volume is not moving greatly because it has not been adopted widely. Even $1,000(30,000 coins-ish) worth a day would be a risk--and an expense in the terms of the time of having someone monitor markets and making sure you could drop it for what you charged. If I was doing 20-30k a day, I wouldn't dare take half of that in coins I might not be able to sell unless I was hoping for future gain (and mind you 30k a day is not profit, its revenue-there are employees, rent, utilities, production, transport, etc, to pay). The only way I would ever accept it when my future as a business was in question would be as a portion of profit only. By putting faith in the system, and being one of the first to take it, I would have to assume that it is viable, and my competitors have to eventually take it as well. Hence, investment. It would be a short sell, but still, if I would consider it worth the risk of accepting at all, it would mean I put some faith behind it. Faith in its adoption would mean I would want to consider how much I could take to ride out for a week or two, or more, without endangering my business.
It is also worth mentioning that I work with a single business that spends tens of thousands on transaction fees(on a corp level it would be tens of millions for our multi billion dollar corp) as a credit card merchant. As easy as it is to talk about, with crypto, you pay a trade fee, and then when you withdraw in fiat. Unless you take more risky low currency value measures, you also pay a fee to withdraw and in some cases another fee to take from the party you withdrew to, to your bank account. While you can find ways to do it to lower fees, its difficult in large volumes, and with a large daily revenue business you are talking about large sums of money are that are not easy to transfer through lesser exchanges with lower fees. I've been able to transfer out 1,000 without fees, and by other means I've seen 1,000 turn into 900 (a huge 10% between selling, transferring out of exchange and then transferring from that party to the bank). The grass is only partially greener. In a large business having someone handle this day to day while accounting for prices charged vs prices sold at and market fluctuations, you have to consider actually paying someone to do that. A whole different discussion is crypto developers streamlining that to make it not an accounting nightmare, but currently, there is a cost to that. You could argue that a wonderful program could be created to do that by the company--exploiting the best lines into fiat, profit vs flux, when to hold, when to sell, monitoring fraud, etc--but since it does not currently exist, the development costs alone for a multimillion dollar business would not offset the merchant fees.
So yes, as a business considering the value of accepting the coin outright vs a smart idea to increase my PROFIT some, there is a lot to consider. No business, starting with investors--whether their own money or others, is going to risk going red on revenue (or more red as many business do not make profit for years), to grab a few more customers(and yes, us cryptos are still a small minority in the world view of customers or even in the Colorado view of customers). To take a cut of profit and gamble that it becomes more profit is a risk a CEO and CFO can get behind. While you might not be thinking on a corp level, even small pot shops have people behind them trying to make money with business minds and in many cases educations. These are serious considerations.
In the long term you are completely right. In the short term, and getting people to start with it, I disagree. If you are considering countries that it is completely legitimate in, that is a completely different question. I was just suggesting an idea, that might get more people on board. Not trying to discredit the idea of it as a 100% pay currency. It is perfect for this emerging industry, but the implications are very different depending what country and economic impact you are considering. Selling the idea to Amsterdam with long established businesses vs Colorado with weeks to months old businesses are completely different playing fields. Both may be interested and stand to profit, but how you sell it to an invested party in different markets will make or break their interest. I want this to succeed, so yes, I submit an idea beyond 'possibly' saving on credit card fees for another path for the dev's to market toward potential businesses.
Though if I was selling the 25mhz ones and had a batch, you would find me on multiple coins for diversification...take a look around and confirm 
However, it could be someone at the fab with the balls to sneak one out and not the companies selling them.
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). Private keys protecting customers rather than a string of 16 digits anyone swiping your card at a retailer can steal. It would decrease their bottom line by reducing chargebacks, fraud, theft, etc. The possibilities are huge for us or 'them'.