indeed bitcoin mining it requires a considerable cost and a long time before doing mining thinking more and smart in making decisions in mining investment
And that is the reason why it is worth it. In time, earning digital currencies are getting harder and harder, if you want to earn a good amount of digital currency while it is still early is to mine them. But as you have said it really requires a huge investment and huge patience but I will still go at investing on a mining rig since I don't want to wait to increase the value of digital currencies, I want to increase the amount of them.