Well, bitcoins might be less accessible if most of the people would not want to sell them, the price would go up even more dirastically. In terms of access, they still will be traded on exchanges so if you've got fiat, you can buy it.
No, in my opinion, in the future BTC will be a strong penny and developers will optimize using BTC, so I think that electronic money will become the major currency in the future.
Yes, I agree with your opinion, bitcoin will become more accessible in future. Everyone will make use of it to do transactions as well as to make payments.