Paper wallet
WhatA private key written/ printed down on paper.
ProsSecure from online threats.
ConsAnyone that has the paper wallet has your bitcoin. It's insecure from physical threats such us burglars, fires, etc.
RecommendationMeant for medium to high amounts that you cannot afford to lose.
*Oct 27, 2016: Bitcoin Core v0.13.1 released. 95% of miner hashing power must upgrade for SegWit activation. | What's New? | Download Update | % blocks mined w/ Segwit | % Running v.0.13.1+