If you want to buy the ethereum with all your money I think need not and should not be, you simply buy a portion of the money you have in the past and then see in the 1 year result. If you've got a big advantage by observing the development of the ethereum, then buy some other altcoin so that the profits you earn doubled from before. and the rest of your money you can save or tubes for the future.
I would suggest to keep an eye on the market situation before to decide if buying ethereum with all of our money are worthy. Besides ethereum are valuable coins but it is better to make an investment with some other altcoins so that if one failed there is another one that might be recover or make doubled profit for atleast you can get earn with it with your own decision making.