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Dear Therick,
If you are into long-term investment, you would be interested in ChainCoin = CHC. The perk is you can be rewarded, just for holding the coin. If you treat your coins as assets, this one would be a good start. You can get ChainCoin on Cryptopia: https://www.cryptopia.co.nz/Register?referrer=EbigK

Dogecoin sounds realy perspective ;)

I think bitcoin and litecoin, personally, and of course you can buy any amount you want. Also, it's prudent to have an offline wallet, such as Exodus, or use a paper wallet.