I do not know whether it is possible to leave the bitcoin in the real state and at the same time that they worked on their increase. But in reality, you can find a company to invest in bitcoin bitcoin up getting interest.
No its not possible i think if some one can spend bitcoin in real estate because it is a real life investement and bitcoin can be used as investement only in the online world.And i dont trust these online investement companies accepting bitcoins and there is huge risk involved in that investement.