Ok so is it possible to buy shares in the growth of Bitcoin if you believe they will go up in price? There is a share called BTC-GROWTH under the FUND tab on BTC-TC, is this a share for Bitcoin if it increases its value in the future? eg if Bitcoin is worth $200 in the future would you make money if you bought shares now?
I think you are confusing what BTC-GROWTH actually is.
It is a managed growth fund that uses Bitcoins as it's denominated value. "Growth" being the investment term: capital appreciation. Maybe this
is what you want?
If you want to only invest only in the value of Bitcoin (against USD, EUR or other currencies), then you need to go to a currency exchange and just buy Bitcoins.