Building another business while accumulating your Bitcoin is not a bad idea, and is very much possible, let's all stop seeing Bitcoin as a source of income because it may cause panic when ever there's a dip or fall in Bitcoin.
This is typical of the thinking of rich people and they always think about making more money from several sectors that they master. Building a business will provide us with the opportunity to collect more bitcoins because we have the money to buy them. But what needs to be considered is whether the business being run can grow and be successful because if there is no mature calculation, the business being run will stagnate and make us lose because it does not develop.
Most people who collect bitcoins do not place bitcoin as their main source of income because tend to use bitcoin as a long-term investment step. They have other sources of income to use for their daily needs so that it does not affect them when the price of bitcoin drops.