Its hard to find any trustworthy place to invest our bitcoins as most of them are ponzi and scam you in long run, so I think investing them in multiple altcoins is a smart move to make at a moment.
I know it's hard but you can find one if you will not be tired of doing good research, one good example in investing in a certain gambling sites since that is a profitable investment, you can put your money in betking or moneypot and even in safedice, those are just some of the gambling sites that accept investment and they have been in existence for a long time.
Yup those are the trusted gambling sites and they holds huge volume of gamblers so they will never scam their investors and they cannot afford to put their reputation at stake.