At 17%-18% ROI on Steempower a year it's not a bad investment at all.

Not at all, especially when compared to earnings from your savings you keep in the bank. However, most people prefer to keep money in the bank and not to earn anything instead of having great returns by investing in Steem. Eventually, it will change once the confidence in crypto rises and people stop thinking “it’s all going back to zero” or “it’s all just a ponzi”.