Let’s say a trader has bought Bitcoin for almost $20,000 in December 2017. The current price of this crypto is around $7,000-$8,000. It is evident that he has made a mistake purchasing Bitcoin at its tops. Why do many beginner traders do those mistakes? The main reason for this is lack of knowledge and some typical emotions that make them buying when the price grows.
Be more cautious about investing your 401k into Barry Silbert’s Bitcoin Investment Trust $GBTC. The (European) XBT Provider ETN is an open-ended fund which means it maintains a premium to the NAV close to 0% at all times. The Bitcoin Investment Trust is an inferior investment vehicle because it is a closed-end fund (it does not increase its holdings of the underlying asset when demand for the product increases) which means it is subject to wild swings in its premium, which has been as high as 150%. So you could make the mistake of buying when the premium is high and suffer swingeing losses even when the Bitcoin price is stable.

No, the successful trader is not me. I’ve gotten lucky a few times and I’m still refining and trying out strategies; on the other hand, I’m part of communities of people who trade on a daily basis to grow their portfolios, and while some of the results can be attributed to luck, a majority of it is based on fundamentals, good habits, and experience.