It may be a good time to buy some very good projects now that the market is down but getting a loan to do that is not advisable in my opinion, crypto investment is risky and it is not encouraging to take a loan to invest in it,
In fact, it is advisable to only invest what you can afford to lose, so I don't think taking a loan is a wise thing to do.
Using borrowed money to invest in crypto is highly discouraged because there is no guarantee that the money will add up in the near future. I myself have never used the money I got from real world work to invest in crypto because I only used bounty and airdrop results for long term investments in crypto. by using this method I feel much calmer even though the market conditions are bearish.
I would say it is not bad to put money you earn in fiat into crypto, that is still a good idea as long as you do not take out a loan for it. Plus very rich people keep getting bigger and bigger loans and then go into bigger and bigger debts because they have assets that can cover those debts.
So, if you are truly wealthy then you could end up getting some big loans and put them into bitcoin as well, since you have assets that generate passive income then you could pay that loan back without a problem, so if you believe that you could take out a loan and pay that back without any crypto returns then that is fine as well. However, if you are a regular person like me, saving some of your earnings aside from your salary and then putting that into bitcoin is enough, if you are taking out a loan with a repayment depending on how well bitcoin does, then you are going to be screwed.