OP, this made me feel like maybe you could become the future world's richest or the first individual to become a trillionaire. The reason why I think so is because you already feel that you could exhaust all the Bitcoin, and perhaps if there's no more Bitcoin for you to buy, what other coin can you secure an investment in? But if I were to be honest with you, Bitcoin doesn't really have any alternatives; other Altcoins out there cannot really and fully be compared to Bitcoin, and perhaps if Bitcoin fails today, every other cryptocurrency might not be able to stand.

Also, I wish to inform you that only you can not accumulate all the Bitcoin, even if you start buying it now and keep accumulating it for years. Perhaps if you wish to diversify your assets, you could invest in real estate, stocks, bonds, and gold rather than risk your funds with Altcoins. just my opinion.