So pardon my ignorance. Why would you invest in Hobonickel if TEKcoin has an even higher interest? Granted, it goes high but it can also go low. And if your goal is not to sell, why does it matter?
If I can choose with my bank, an offer at 10% interest and another at 15% and that both are equally risky (or risk-free), why would I ever consider the 10% (except fear of a scam)
Probably I misunderstand all of this, thank you to clarify.
Your assumption is that all coins are equal, and will enjoy same level of adoptation and price development.
As for your bank interest rate parable, you should think of it as depositing money in 2 different countries, each with different inflation levels and economic development.
The fact that TEKcoin has such high level of interest rate means the money supply is going to keep prices down, and potentially 40% return in a month may be offset by a 50% drop in price. Also up till recently TEKcoin development was almost non-existant, that combined with massive inflation built in to the coin made me cautious to invest too much in it.
20% interest rate of MintCoin is crazy high if you compare to most high street brick-and-mortar banks, but cryptocurrency cannot be compared to the physical world, yet. 20% price corrections in a single day is not unheard of, and in that light 20%/year interest rate is not much of a hedge against price fluctuations.
PHS price has been very stable despite the recent issues, and with that in mind 50% APR is a pretty sweet deal.
Just my 2 stones.