Most People I have seen who are into landed property investment only sell land to buy another land at cheaper prices, meaning you can only sell your Bitcoin to Buy more Bitcoin, selling some portion at the top to buy back the dips.
Creating such comparison or similarity between Bitcoin and landed property in terms of investment is very wrong and can be misleading because at some point when considering what derives the price of Bitcoin going up or coming down is not as the same as that of landed property, Bitcoin price is the same all over the world, but you will end up buying a landed property in different prices
all over the world based on locations, Bitcoin is not a quick and get rich scheme selling some portions to back at the dips is very unrealistic because the market is uncertain and you can sell and end up buying at a price higher than your selling point, i believe one of the reason why consistency of increasing our Bitcoin size and hold for a longer period of time is for us to reap more than just a peanut and possibly pass on to our generation.