1. Bitcoin value is all based on sentiment. Most people say it is under valued now, but that is only a reflection of how you feel about it. And this is fine, because in comparison most stock prices are irrational as well (especially these days). people make lots of money buying over valued stocks. But the problem I see is that the fear-of-missing-out sentiment has passed. Almost everyone know about bitcoin now.
Wrong. Not even 30% of people in the world know about Bitcoin. You see, you're prediction is nothing but a reflection of your attitude towards BTC. You think that since you and your friends know about it, everyone does as well. I advise you to check how many people have access to Internet, how many people have basic computer skills, you'll be surprised. I live in a small town and if I were to start asking around maybe one out of 10 people would know what BTC is and not even 1 in a 100 would own one.