I would like to increase my bitcoin volume. Cryptocurrencies are growing. They are not stable. It means that they move up and sometimes down. The value of bitcoins can grow up and this means benefit to the owner. Regarding the dollar, it is more or less stable. It is a fixed value. If you save 100$, it will have more or less the same value in some years. The bitcoin in some years will make new millionaires. Those who have bitcoins now are going to be millionaires very soon. For that reason, it is better to increase your bitcoin volume.