If it's your own money then you may not be doing wrong but since it's another person's money then you're doing wrong . There are things we're advised not to do as crypto investors and traders: never invest/trade on behalf of someone with their money; never trade/invest with amount beyond what you can absorb in the case of a loss. Be mindful of the fact that market volatility may end up not working according to your plans for the end of the year.
I think the OP should pay attention to the above suggestions before he decides to invest part of his father's retirement allowance into crypto investments, the first factor is that the investment fund belongs to his father and he must ask permission from all family members to provide long term investment solutions that have the opportunity to make big profits in a few years , and he must also explain the impact of risk of loss if he does not consistently hold assets for the long term.
The second solution, if all family members trust the management of funds to the OP, then it is recommended that the investment fund is lower than some retirement benefits, for example 30% of benefits, the Op must also be knowledgeable about crypto market analysis and prioritize adding assets by the DCA method or diversification, so that OP has the opportunity buy at any price correction or better be patient waiting for bearish market conditions as BTC prices are heavily discounted.
Im pretty sure that he dont have access into his fathers retirement money but rather trying out to convince his father about investing on Bitcoin on which means that proper explanation would really be the key on here on which whether he would really be explaining it to this father if he's really that serious on telling him about investing on Bitcoin. He should really be that knowledgeable and somewhat convincing about the explanation about it because if not then for sure his father would really be just simply reject out such proposal or recommendation on investing on Bitcoin. In overall it is better not to make your Father do need to make some choices because its his retirement money after all, maybe he had something that really wants to buy or purchase but if you are really that somewhat close to your father and having that
open to each other then it wouldnt really be a hindrance to make out some recommendation in regarding to it.
OP has to do all of that because investing in bitcoin is very risky if you don't have good knowledge and moreover you have to have strong patience in doing it, that's his father's retirement money, maybe there is a plan or want to buy something that already exists. He had been planning for a long time what to talk about and asked what his father wanted to do with his pension.
and my advice OP should ask for his rights if he has them, because father's pension is definitely for his family, especially his children. And if you have the rights, there's nothing wrong with asking for them while being careful if you have the rights then you will use them to invest in bitcoin.
and with this you can explain very clearly and what your motivation is to invest in bitcoin and also explain the risks that will be faced, and with this I hope that your father is willing to invest part of his retirement money into bitcoin.
and investing in the long term is the best choice, but you have to think about how your house will be in the long term, it is best if your retirement money is divided up including home repairs. And I also don't understand because OP's admission that he wants to build a house with retirement money, does OP not have a house or does he have a house but it's not in good condition, and my suggestion is to fix the house first. If that's true, and fix it as necessary so it doesn't get worse in the long run.
and all that so that all important needs are met and you can also invest in bitcoin in the long term, bitcoin is indeed a promising long-term investment, but you have to think carefully and don't have to sacrifice something important and invest with money you can afford to lose.