Bitcoin investments are never considered money laundering unless they exceed the money laundering amount. Anyone can invest in bitcoin if his country has legality of bitcoin in that case he will be able to invest in bitcoin openly publicly but if his country does not have legality of bitcoin then he can invest in bitcoin also because using a non custodial wallet for bitcoin is untraceable for anyone. It is not possible to know who owns that held wallet. However, when you buy bitcoins via fiat, your identity is still at risk
I think you have not understood the topic properly. This is not about money laundering or bitcoin legality or illegality, but the real issue is whether real estate is a better investment or bitcoin investment is more profitable. There are many countries where Bitcoin investment is not legal yet people invest in Bitcoin, but due to the lack of legal status, many problems are also faced, there is always a fear from the government that they can ban the exchanges at any time, thus their assets are always at risk.
People who invest in Bitcoin are aware of all these risks, so they create safe ways to protect their Bitcoin. However, as far as investing goes, I would personally prefer to buy Bitcoin over Land, because I don't see Land as much profit as Bitcoin can give me in the next few years.