I avoid using one wallet because if use one than if my passowrd or email gets hacked i will lose all my bitcoin that is why i use Xapo,CoinBaseand Blockchain for my bitcoin wallets
I use 3 different wallets because it is much safer (imagine if your account gets hacked u lose all your bitcoin ) but i use Xapo as my main waellet cuz it is faster
just like any currency bitcoin is used for illegal activities but it is better for the pepole who are doing these activities since they don't have to make any interactions with the buyer since it is totally anonymous
about 10 of my friends started using bitcoin because of me at first they thought it was nothing back when the bitcoin price was around 100 but they started beveling in its potential when they realized how fast the bitcoin price was going up