Buy and hold the coin. Mining is hard and is going to get much harder. Your competition will have a different set of incentives as they seek transaction control rather than coinbase rewards. If you are looking for a business, choose any profitable business, store your profits as bitcoin and measure your business's success on your total stacked value. Make decisions on business growth based on whether your stored stack will increase rather than your gross revenue. Help usher in a new era of rational small businesses owners.