In my opinion by investing all savings in cryptocurrency no good idea, I think maximum 80% of all savings and other 20% keep on fiat. Because we need to keep Fiat for urgent needed, and when this happen and the price of cryptocurrency down then we should be withdraw it. So that we are in loss. In my research good coin for longterm investment is BTC, ETH,WAVES and DASH by portofolio 50% BTC and other 50% for those altcoin.
I think you should divide it into three parts, the first part is for your investment this is the half of your saving or 50%,but make sure pick the best cryptocurrency to invest second is for your saving make it 30%, and for the third for your emergency need and make it 20%
I am not in favor of investment all the savings in bitcoin because one should keep some local money in his bank account for immediate use and the other reason is the reliability and security. Bitcoin control is in other hands therefore many people do not trust bitcoin because of the fear of losing and I think they are right although the controllers and wallet maintainers have made their sites very secure but still there is a fear of backing.