The best way to explain it is to make a good statement rather than making a long and very technical definition that is hard for the reader to understand. So here is my explanation " All trading is an investment but not all investment is trading". It simply means that even trading itself is considered as investment. But investment has many forms aside from just trading, it could be investment in networking, loans, business and many more.
Though trading and investing is like that. It should be good to know that trading is what we called buy and sell some tokens. Were in investment we buy for token but not for the sake of selling again. Its about holding tokens for long time or even investing money for some ico or for bitcoin. Invesent has a lot of way. Unlike trading is to buy and sell only.