I dont know in how many years you want to get married, but regardless of this, you should consider how much risk are you willing to take depending e.g. on the future purpose of this money and the harm which would be caused by losing it at all. Also not sure if it is a good idea to put all these savings only to crypto, but it depends on your answer to my point above. For your altcoin investment, if you want to reduce the risk, you should choose several coins and split your savings among them. Your risk can be further reduced by higher share of coins with bigger marketcap. So take some time for a research and choose carefully