Mine would probably be;
1 Before investing, spend time learning about cryptocurrencies and blockchain in general
2 Don’t look at it as get rich quick scheme, but as a long investment
3 Learn ways to keep your bitcoin safe and secure.
Yes, this is very essential for every btc holder, trader, seller and all over cryptocurrency engaged people. Before buying one should know how it keep secure into his wallet and how he secure his wallet. Finally one have to learn more and more before his transaction and trading.