That would help but it is more dangerous to save your paper wallet than in online wallet because your paper wallet might be loss while if you have your bitcoins online you can get the service of the good site to secure your bitcoin, the security is what matters if we are talking of a good amount of bitcoins.

If I was trading them today, I would put them in Ethereum, Ethereum Classic and the Antshares ICO

If you will give me 10 bitcoins i would hold them for sure and that is only because i got them for free you know i don't know what the price will be in 10 years but free is free so if the price of the bitcoin is around the 1000 each i would be very happy person then when i am selling them right now.

Trading is not a bad idea but You need to have proper skill and knowledge about it also need some bit of luck. Also you should aware of scam.  Although, if you do it properly you cam make good profit by trading.

I would hold at least sixty percent of it. I believe bitcoin has a bright future ahead, but diversify the investments is really important to bring some financial stability.

Yes I think it is better to use these 10 BTC bitcoin to produce more bitcoin, it is also advisable to diversify since not all the time a business  is that profitable, so when you diversify and invest  in different ventures of business, it will only assure you that there  is another one to catch you when the other business is not performing that well.

Yup and if I have 10 btc then I would simply invest it in trading, as it can give me regular profits and it will also increase the volume of coins in my wallet so in future I will be holding more coins.

I'm gonna invest it instantly, cause at my opinion investing money with brain is always profitable and i believe that i have brain in my head

I doubt gambling the funds count as investment at all.. there are few ways to invest that sum. Either get involved with altcoins trading "which is also gambling to an extent", You could also invest some of it in shares of cryptocurrency projects, personally I would just hold it.

investment is profitable there is no doubt about this, but it is also a face that investment of any kind is risky, therefore you must be extremely careful while investing bitcoin, because you can even lose your bitcoin in no time.