This is a high-risk investment for couple of factors like its price is unstable, people unsure from now exactly where its value would go.You will not receive earnings really quickly, yet over the years.Bitcoin could hit $100,000 in 10 years, i read the news a few week ago.
With regard to smartphone wallets, there are lots of high quality ones, however to begin you off some recommendations are Mycelium, Airbitz, Copay, or Blockchain dot info. For wallet applications, you can look at Electrum or Multibit. I'm really sorry if my information is wrong. Senior member can help.
It's alright if you would like sell it off. However not necessarily recomend for sell all of your bitcoin. The price will raise once again soon. Given that several country now acknowledge bitcoin as transaction. The price will rise over and over.