i would like to recommend to invest on alts which has no many market atm but has a great future project.
It will 10x - 20x your money in 1-2 years.
such as : ETN, NAGA, Indahash and any other big project
There isn't any 6 months payback project you know?
I mean I was asking if I keep 100 ETN will it give me more coins as reward every month ? like a savings account in bank which gives you interest on the money in bank account
Naah. No way. Crypto don't roll that way. You don't get interest because you hodl a coin in form of additional coin, nope. It doesn't work like bank savings that you either get interest for having your money saved with the bank.
In cryptocurrency you either hodl a coin by investing- that I'd, buying the coin. The number / unit of coins you bought does not increase by additional number except you buy more. However, the monetary value of the number you have can increase or decrease. For instance, when you buy a unit of a company's share and if you don't buy more , what you keep having with the company is one unit of share . You can benefit with the company when profit is made and it is distributed accordingly to the number of unit you have.
Anyway, what seem like what you are asking for in crytpto currency is airdrop which you benefit freely if the coin you are hodling is introducing another brand of itself. You get it according to how many coins you already have of the "mother" coin.