i think Bitcoin is only profitable if done at large scales. you must get expensive mining equipment and of course it consumes a lot of electricity monthly. Also its usually much more cost effective to buy Bitcoins with this money instead of using it to buy mining equipment.
Yes, I agree with your opinion that Buying Bitcoin and trading it is more profitable than having to buy Bitcoin miner equipment.
I think mining Bitcoin would be profitable if done with a lot of equipment, maybe it can only be done by a company.