Every bounty have its own rule and those rules are published at the start of the bounty and if you are not agreed with their rules, you can leave that but you cannot question their rulings.
This hacking is a very serious issue as we heard every fortnight that someone got hacked and lost all his coins hold in that wallet but still no solid solution available to stop it. The only way to save yourself is, never click any unknown link whose source is not verified.
Bitcoin is a legal tender in Japan and you can use it just like fiat there. This has no relation to altcoins as the only bitcoin is a legal tender there so no effect of it on altcoins.
ICOs cannot kill bitcoin but they are damaging the credibility of this market as many ICO were not able to fill their promises and investors get huge losses and some ICO go scam after getting peoples money and bitcoin has no direct relation with ICO.