If you have a decent know-how on oil industry, I see no issues in starting your own business and generating revenue through it. It will be a safer destiny for your money, considering Bitcoin can be quite volatile sometimes, especially after the peak of a bullish market. Moreover, it doesn't mean the end of BTC investment for you, as you can continue investing in BTC as your business returns you profit.
I also think you will feel more self-realized as a businessman than as an investor, because it's rewarding to build something with your own hands, and see it bearing fruits after a while. Just make sure there will be demand for what you are going to produce, so you don't get frustrated with a lot of supply without having where to sell your goods later.
Building up business can be a positive suggestion but there are a lot of factors to consider before putting that suggestion into consideration. The business personal needs to figure out can his business make a lot of demands in his environment and will there be possibilities of such business being successful.
In my opinion I will rather prefer investing than owning a business, because I know fully well I am not that positive with business and all the stress. so I much prefer investing.
But your suggestion made a clear point but I’m just making preference towards myself.