Suggestions?
Bitcoin: Bitcoin is unstoppable. The worldwide community is too strong against manipulations by traditional finance sector and governments.The innovation of blockchain can't be destroyed like internet. Third parties are not needed for payments.
Dogecoin: It recovered fast from the general crash of cryptocurrencies. It also gives a nice opportunity to lend on Poloniex. If you have the opportunity for an account on Polonoiex, lend them for 1% daily. The margin traders are speculating much on Doge so they pay the rates.
Monero: In my opinion Monero will one of the leading cryptocurrencies in near future. More and more governments will try to take influence to cryptocurrencies and track all citizens, who hold cryptocurrencies. Monero has proven high privacy and can be used in case of a ban of cryptocurrencies.
Ethereum: Ethereum has one of the most interesting platforms for innovative projects and crowd funding (ICO-projects)
ICO tokens:: There are many scam projects, but also promising ICOs coming with innovative projects. These kind of investments need a good research to gain great profits.
I would generally recommend well established decentralized altcoins for long term portfolio.
Agree with everything except dogecoin, I personally don't see a long term future for it. Though I guess you could make a quick buck from it.