I feel that the best option to secure your data at 3 to 4 places so we have the option if we lose one option still we have the option to access the data we can store our data in Google drive, USB flash drive and make a soft copy.
In my opinion, It is not possible for Ethereum to threat bitcoin supremacy as its leadership is unchallenged as Ethereum is far behind in all fields against bitcoin.
There are many ways to get them and you can get through participating in various bounty campaigns like facebook, twitter, linkedin, content creation, signature and also through airdrops etc.
There are good and bad altcoins and we have to do some research to find good altcoins from them as all altcoins are not bad and some coins will give unexpected and imaginary gains to its holders.
The whitepaper is just a document to get all information about the company, team, and roadmap, how they start an develop their project but own research is always required before making an investment decision.
The developer distributes some of his coins free to attract the attention of the people towards their project. This system is known as airdrop. You can make some profits using airdrops.
You can get a new bounty from the special board in this forum, whose link is https://bitcointalk.org/index.php?board=238.0, and you can join the best Bounty Manager Telegram Channel, which will Update new bounty.
I will give a big chunk of my investment to bitcoin because bitcoin is the oldest coin of this market and all the coins follow this. I do not see any comparison between bitcoin and ripple.