...if there will not be a fix for the long confirmation times (don't tell me raise the fee) I doubt it will ever be used on a big scale.
If, by big scale, u mean small payments, then no. Bitcoin does not aim to scale to support huge amount of minuscule payments.
Even if it reaches 5k... this is not how it should work. It can fall down big this way.
Bitcoin does not aim to replace StartBucks. It aims to replace PetroDollar. So, this is exactly how it should work.
Look at Dogecoin how fast it is in comparison... that's the way to do it.
Look at Dogecoin price for comparison.
Let's hope for a fix... in the near future. To be trustful and really become popular it needs to be fast. It's a must.
One crypto can not be 'trustful' and 'fast' at the same time. One compliments the other.