Trading is now best way because the price of bitcoin is increasing day by day
The price of bitcoin now is near to $1,600 and trading is really the best way for profit. Mining is hard right now after a lot of halving and there's more to come the difficulty level of mining bitcoin will increase. I don't want to suggest mining of bitcoin right now, if you want to get a better profit, go try to trade right now.
Yes unlike mining, we can expect bitcoin trading will be profitable forever even in the future too. I do believe once we learn bitcoin trading then it would be supportive for a living until end of our life.
But mining on the other hand, will not be profitable even for 10 months given to some big mining power, when difficulty increases we need to increase our mining power so that we can maintain same level of profits. I do see some people are re-investing some of their profits from mining for maintaining their hash power competitive all the times so that I guess they will be making profits continuously even with bitcoin mining.