I would say if u really want to invest in crypto market go ahead andd invest in bitcoin,Ethereum ,litecoin and ripple alsoo.
but regardless of others invest your max in bitcoin as it is one of best than the rest..

Bitcoin is one of the best digital currency and it is important as its value is increasing day by day ..It was only of few dollars at start but we can see that its price has increased dramatically in the past few years so i think it would be the top  future currency in the upcoming yearss..ALSO it is decentralized currency which makes it differ from the rest.

there are so many wallets in which u can store ur coins but i would recommend u hardware wallet,paper wallet ...and for bitcoins as far as i know blockchain wallet is one of the best in the market to store cryptocurrency.but u should save your personal data like passwords in your mobile phone or tab to avoid risk in case u forget your passwords.