Some people see Bitcoin as a source of income and they wait patiently for it to grow so they can sell and it profit especially those who are traders, a lot of people see it as there only source of income but we forget Bitcoin is very volatile and anything can happen at anytime one can be expecting to get a huge profit 3 years to come from Bitcoin and Bitcoin falls, this has caused a lot of people depression and it is advised that will use our Discretionary Income to invest in Bitcoin.
Some people says before investing in other business you must make sure you have accumulated enough Bitcoin but that's not it one can still invest in a business that will give you income while accumulating Bitcoin especially for those who are not long term Bitcoin investment.
When you build another business that brings you good profit it will help you grow your Bitcoin more bigger.
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.
One if you have a source of income and you are after spending day to day expenses, you have enough money to invest in BTC and to start a business then there is nothing better than that. Business is one of the things that can bring exceptional profit that a person can't think of. But the business should be a good one, proper study should be done before start to do it actually.
Investing in BTC via DCA will bring more profit, and you can cash out your profit after a long time, if you don't want to invest in BTC for a long time but want to trade (about it, you are wrong, IMO, as trading is not that beneficial compared to holding), then you might not have enough time to give to business, so keep that in mind too. I would love to start a business and if have enough money wants to keep investing in BT as well. I don't that that much resources yet but maybe when I will have.