I am sorry to tell you that, but you have to know that 1,5% is too high to be safe.
And if someone tell you that he knows a guaranteed way to make such gain then be sure he is a scammer and trying to steal your money. Some of them let you make the profit you want for a month or two and when you invest more they take your investment and disappear.
It's not so high, my banks offer 12% yearly in national currency. Well, there is no guaranteed way of getting 1.5 or even lower percent because everything depends on person and his/her knowledge but I would say that investing in hashnest isn't a bad idea. What I like in this website is trading with hashes and I think it's possible to do more by trading than actual mining on hashnest.
Please do not forget that although your bank offers 12% y/y in the national currency, probably the (real)inflation is also around 12% or more. So for you who lives in that country probably at the end of the year you are break even with regard to your real purchasing power.
That's why it's necessary to take into account the inflation/risk free rate when you are considering to invest into something.
Bank deposits were not created to make profit, but to keep pace with the (healthy)inflation according to the Keynesian theory. But whether this is good or not is another discussion.
I don't know that theres still people who do treat on those bank interest as a profit making thing for them. I even not consider that this is a good interest which is normal because no bank on this world would really give you too good to be true interest rates annually which they do have always similar or small differences on what they do offer depending on which bank but rest assured its not really worth at all even on 1.5% monthly isn't possible for annual interest.
Exactly carlfebz2. Not to mention that since the Central Banks around the world used the so called Quantitative Easing/ZIRP(zero interest rate policy) and even worst, negative main repo deposit rate, its no wonder that bank deposit is extremely inefficient for the end client.
They are left with junk corporate bonds but even there the yield is so small given the possible default risk! Its crazy and a scary thing.