Funny you write this. I send bitcoins to an exchange 5 hours ago. They are still in limbo. Should have added a higher fee but I wasn't paying attention. I'm paying the price now. Could be days.
For micro transactions, bitcoin is not usable at the moment in my opinion because of the high fee. But it can still be a store of value.
Why would people store value in a currency that only a very few people can use?