is creating a wall that makes it harder for BTCto be a universal economic currency. Stores may take 1BTC for a product and in the AM that 1BTC could be valued at .08BTC. Obviously theres a ton of positives to this happening I think more than negatives. I for one hope it does though because USD is getting old 
The same way the value can drop is the same way the value can increase. As much as we know the volatility is high, it does not mean it cannot be used. Later on, it will always amount to something. You sell stuff at a higher value, tomorrow, the value comes down and you sell stuff again, the increase in value eventually will still make you earn even more after a while. However, there are some platforms for merchants like bitpay that can easily convert the merchant's currency straight to fiat.