Getting back around to this and I will try to answer some of the questions.
Yes, Bitcoin does not have any intrinsic value, so pull a dollar bill out of your pocket. That doesn't have any intrinsic value, either. It is all about the value people place in it relative to other currencies. Right now, that's 1:11,065 in U.S. dollars for Bitcoin.
I agree on the emotions. Psychological studies have shown that the high from gains is not as strong in our minds as the pain from losses, so it is best to either be dispassionate or invest in safer stuff, or at least remember the evidence about reactions to gains vs. losses. I have about 10% of my portfolio in marijuana stocks, and I have to have a strong stomach in that sector.
My Bitcoin mining friend started mining 24/7/365 when they were about 25 cents each. He has already hedged out about $5 million by selling highs and buying dips, so he has wound up with about the same 1,000 coins he had before and $5 million in dollars. He can afford to let his coins ride the market, since essentially he still has nothing in them except the $150 it cost him a few years back for the mining hardware and software. As I write, he's worth a bit over $11 million in coins and he has the $5 million cash. Interesting guy, a former computer hacker actually, he still goes to work every day at his $80,000 a year job, for fun. He is in it now for the long gain, says he'll keep his coins even if they fall to a penny each because long-term it will all pan out. WTH, he's only 36. He has the time to gamble.
Coinbase.com is the site he recommended to me. Compared to my stock sites, it is clunky but it supposed to be the best Bitcoin site. I sure wish I had bought at $600 when Richard was urging me to do so. LOL.
My cousin just retired 3 months ago at age 58 on his Bitcoin profits, after cashing out. Sold his place, moved to a 3,500 square foot home directly on a golf course in Florida.
Yes, Bitcoin has been predicted to pull back into the $5,000-$7,000 range. Who knows how long that will last, since wild swings can happen just in a minute's time.
Tech savvy traders in stocks and Bitcoin may want to look at
https://robinhood.com/ - a 5-year-old company that offers free trades in both. A guy I know has been using it about a year, likes it. I am still with my online brokers. I have a Coinbase account but have never bought any coins. So far.