WHAT IS SAFEST WAY WAY TO BUY BITCOIN IN INDIA

[danielpjTTP]

Hi
I am from India and have bought Bitcoin through bitcoin wallet “Zebpay” four month back. I have some doubts –
i.)  I am planning to buy more bitcoin to keep for long time. Which is the best website in India to trade bitcoin. I want to pay in  INR ?
ii) If in case i want to withdraw the money (after selling bitcoin) to my bank account after two or three years then how it can be done?
iii) Which is most secure –  Paper wallet  or Hardware wallet ?
iv) i want to keep all bitcoin for long time (if may be 10 years ) then what should i do ?
v) Is it advisable to buy bitcoin for such a long time period?