Yes BTC will be profitable.

Please carefully store your master seed.

A new bounty for

bittrex is good for beginers, please buy btc somewhere to deposit in bittrex fo trade..

You can use 1 address. They say that using the address repeatedly might be capable of getting hacked.

Cheapest - Paper wallet, store them carefully
safest - hardware wallet

Your budget is enough to experiment witha a masternode. Arc is a cheap one for masternode. Rest in portfolio you can keep waves ie. A long term coin.

ts true that cloudmining is worthless, there is no profit there. The coins woth minining with less powerful hardware is usually a new coin with low difficulty. You can also try Staking, it is a newer form of mining you just keep a fixed number of coins in server. This is also known as masternode.