So, I decided to buy something with BTC and I bought it from a trade at a website. The trade went smooth and I got my bitcoins in my wallet of the website. I downloaded Bitcoin Core Wallet 0.91 and installed on my computer. It has a default receiving address and I sent the entire BTC from my wallet of that particular website to my receiving wallet in my BTC core wallet that is installed on my PC. Blockchain shows the balance when searched with my address. However, the balance does not appear on the BTC core. Does it need to synchronize? It says, 144 weeks behind. Should I wait until the entire synchronization is complete?