where should i invest and why ?
Oh no... That is a lot of money you are talking about. I would not suggest you invest all of it in any cryptocurrency, or invest at all. Make sure you have at least a decent amount of money left for you if your personal situation turned sour. The loss of a job can make things really hard and you need a financial safety net in times like this.
However, I would suggest you do your research about ICOs that seem to be of best interest to you, but I would personally invest some amount of it in Bitcoins and hold onto them. Holding onto your coins will certainly have its benefits.