I havn't watched that video but in that case it is certainly a good omen.
Yup, that kind of thinking is dangerous - that is trying to make a quick buck of the small coins. I myself have been through that experience and it is a huge trap. Bitcoin and Ethereum are the basis of a sound portfolio. Lindy effect is definitely in favor of theses two, particularly Bitcoin.
Bulls are still very optimistic for 2018 and we all have good reason too. For the the long term hopefully the bulls will get a firm foothold :-)