Interesting to read this in retrospect what people were thinking at the time in 2014.  Now we have some big names like John McAfee saying $500k in 3 years.  The price in South Korea broke $4500 late this spring then dropped down.  Currently the price is at $3350 after reaching almost $3500 after segwit locked in.

For $500k to be possible, bitcoin will have to scale many times and probably have mass adoption and have easier to use apps hooked up to smart phones.  The transaction speeds will also have to improve a lot.  Currently it can only process 10 transactions / second.  Ethereum is double this.  To get to the level of Visa/MasterCard it will have to handle at least 25,000 transactions per second.