Gold has the lowest amount possible out of all three in your comparison but easy to fake.
Real Estate has the highest amount possible out of all three and will always grow with a steady growth, someone always wants to buy and its getting fewer and fewer.
Bitcoin has the medium amount possible out of all three but you can't and assume the next 15 yrs growth because of the last 15 yrs.
No doubt that real estate is a good investment but still can't compare it to bitcoin, starting your real estate investment with the amount as little as $10 won't be enough to generate substantial income , while bitcoin as given privilege to those that are not too financially stable to accumulate bitcoin with as little as $10 (using the DCAing strategy ) . And as time goes on with a proper and frequent DCAing one can actually build a good and portfolio in bitcoin that would yield them good profit.
Bitcoin has the medium amount possible out of all three but you can't and assume the next 15 yrs growth because of the last 15 yrs.
yeah you are right that the past performance does not guarantee the future and all that, but still during those past years bitcoin didn't have the adoption he had now but still, bitcoin kept increasing tremendously and as time goes on bitcoin would keep on getting the adoption it deserves. And at that time being a no or low coiner would only lead you to a point where you gonna be saying this shitty statement "had I known". Because that what alot of individuals that had the opportunity to buy bitcoin when the price was still low are and they didn't are saying now. While some that hold back then till now are damn proud of themselves for the action they took back then , In investing in bitcoin.