I invested half of my saving ($25,000) into ETH when it was $725. ETH has now plunged to $459. I am very worried I will keep losing money and I fear for the worst. I want to go kill myself 
God you're a drama queen...
Never invest more than you can afford to lose. You can read this on almost any crypto site, article, exchange, forum etc. If suicide is your option now, you probably didn't respect that one and only rule. I hope you won't commit suicide but I also do hope you stop whining.