Bitcoin will never be instant, and that's why people won't use it long term. In our dynamic world things need to be fast and instant.
bitcoin was never meant to be "instant-confirmation" and people have been using it fine so far knowing it is not like that.
although bitcoin fees these days are not a problem as you think but i agree that having such high fees and having them shoot up like what it did over the past 30 minutes is bad for bitcoin adoption as a currency.
as for price, investors have shown that they don't care at all about price and so far they continue buying. in fact these spikes is exactly because they are buying bitcoin! and in the long run bitcoin scalability is improving so you can't really say it won't go up in long term.
+1 to this one and also, in long term it has a lot of reasons to rise, one of them is bitcoin halving.
On another hand transaction confirmation isn't problem today. Almost every service, including shops, wallets and etc accept instant payments, once their machine checks transaction, if it has normal fee, you get automatically instant confirm from them and don't need to wait hours to see when it hits 6 confirmation.
Also people look bitcoin as an investment option which gives another boost of possibility that bitcoin will rise because a lot of people invest in it and this investment is different from others. Plus don't look bitcoin only as a currency, it's payment method too.