Please take a view again what OP has asked.
He asked to suggest him what he should do with the 10 BTC by giving everyone 10 BTC imagination.
You should suggest him what he should do instead of posting your plan which is ( Buying a cat ) . -__-

I wouldn't donate it... I am not giving money to the homeless anymore either because I've seen many things happening when I did and that made me regret doing it.

If I would donate it to the homeless, I'd create my own campaign and give them the money personally.

I think you give a little bit of income to the poor may get better, think, if you who are in the opposite position, I think you need the people who give you money. perhaps by giving a bit of income you get, God might restore in greater numbers. well maybe if I get 10 BTC, BTC its probably 3 would give the homeless, and the rest to build a business

For a new beginner, or anyone it may be, will be really exited to have it. Because everyone knows how hard it is to earn 10 btc. Will be very happy to spend it for my family and the poor in need. A lot good can be done with a sudden lot amount. Can be given to a trust or can be bought few household items and give them to people required.

i would go to germany for a vacation....

i would also invest it all in my opinion, it is the best way of making money easily and i think holding is for people who are cowards only and are afraid to lose

When you are having good idea about trading why not you go for all the 10 BTC instead of going only with 50% of it. When you are aware of how to grow your Bitcoins with the trading, then it must be good decision to go for it with all your money. But at the same time, if you have any other plan for first half of it, that also for making it to grow, then nothing is wrong.

People will go crazy if they loose everything in one shot, so its good to not to get too greedy but be on a safer side by saving it for future.

If price reaches to $1k then I will sell all my coins and invest that money in real life where I can expect good returns regularly as the future of bitcoin is unpredictable.