First answer : I've been talking about BTC for 4 fucking years you fucking mutha...... :)
Then I would say to buy a certain amount that he/she feels comfortable every month regardless of the price, put it in a savings account and thank me in 5 years.
In other words CDA is the best choice , you cannot really time the market...
Long live the Blockchain !!!
RE: What to you answer whennyour friends ask you about BTC