I think you can invest it in any altcoin but you shoulf pick an altcoin that have good project and roadmap hold it for the better like what i did in some altcoin here that i invested and now i gain more profits just hold it a months or much better a years, then after that you can see your money growing without doing anything
Op specifically stated that he wouldn't take any risk. Altcoin investing and trading - I can't imagine that you would like to keep new altcoin as a long term investment is epitome of risk.
To Op, your initial investing capital is so low, that any 'sure' way of investing would give you pitiful profits.
Keep your Bitcoin in your wallet instead, deflation will do its work.