I can agree with that. $100K is too much for 1BTC, we may really be seeing a huge dump when it reached that price.
Wasn't $20k too much for bitcoin ? or wasn't $50k too much for bitcoin ?
Yet we are seeing an increasing demand for bitcoin each day. Although even I am sure that we will see a huge sell off when bitcoin reaches $100k but we can't really say it's too much for bitcoin.
You never know may be in a decade it might cross $500k as well. Knowing our targets and buying/selling as per our strategy is the only thing we can do to not regret later.
I believe there should be at least some portion of our bitcoin holdings that we should keep until we retire or to pass it as a legacy.