A combination of both methods work well,if strategically managing a portion of your overall portfolio for trading allows you to invest for growth over the longer term.
For me I'll prefer to go with investing cause knowing the amount of losses one attain while trading and the fact that trading requires a wide range of knowledge, so a good comparison to investing it's quite profitable and will lead to a long term success and growth.but one can apparently trade while investing as well but what matters it's being able to strategies in being profitable.