I think your choice is completely suitable and I am really impressed with your plan ,especially bitcoin possesses much more than any other coins. Through its notoriously volatile, it’s not easy for us to say its future,  bitcoin now is fluctuating currently and it’s getting increased and I think that bitcoin have bright future and potential, therefore you should have more expectation on bitcoin. I don’t know much about Zec, however I’ve heard many people supposed it’s also a good coin to choose. I often see many people investing ethereum follow bitcoin, cause its potential and popular. I believe that all coins in your plan will have a bright future.