first you need to at least see the total coin supply and circulating supply its easy to say you buy coin in $0.1 and it going up $0.12 let say the total supply is 10billion and circulating supply about 5billion it quite hard to get up. before you buy coin make sure you check coin supply and marketcap
it depend on your wage and your happines on your present job if you think your wage not enough or your not happy with your job just quit and start for bitcoin trading
no its very risky to risk your house or your property to buy bitcoin because bitcoin price is so speculated it could be up and down drastic always keep remember this sentence "only invest money you can afford to loss"
if become legal in all country we will go to period of mass adoption people will know bitcoin as currency or maybe store of value and impact for alt coin maybe the price will go up and up
to join bounty signature campaign is quite easy first make sure your account rank is jr or above even there some campaign accept newbie and then open this link https://bitcointalk.org/index.php?topic=615953.0 and search for signature campaign after that open the post and read tos and how to join on that post
basicly its supply and demand bro you know the bitcoin supply is limited right ? and the demand is very high and dont forget about the value of bitcoin tech like blockchain its new kind technology