My best guess is that, in 10 years, bitcoin might be around it's absolute peak of 30K
I would be fine with that in 10 years, but I don't see why the peak would be so soon. There's no reason for it to stop growing so soon.
It all depends on whether or not institutional investors will start to take Bitcoin seriously. If they even allocate 10% of their entire portfolio to Bitcoin, we'll cut through the $30,000 mark like a hot knife through butter.
That's why legalization is very important. If we see various Bitcoin related ETFs become reality somewhere in the next years, it will definitely help opening the doors for institutional investors.