How it would be when we have a physical bitcoin currency note? Do they already exist? If created, will it impact the market growth and loose it's value in the market? Any thoughts?
That doesnt make any sense to me, and there is no way its going to happen. The only thing that can be used both digitally and physically is conventional currency; dollar, euro, sterling, yen etc. These ones are controlled by banks and how they work is totally different from Bitcoin and cryptocurrencies works.
By the way, if you are using physical for Bitcoin who exactly is going to mine it, or should I say who is going to confirm the transactions you make? So just forget about it, its never going to happen.