IOTA can only be purchased by exchanging another cryptocurrency for it. Coinbase is a convenient and reliable exchange for first acquisition of bitcoin or other cryptocurrency and will accept an initial fiat currency (dollars, Euros, etc.) deposit by debit or credit card, or direct transfer from a bank account.
Coin Collecting HOLDERS. The easiest way to store coins is the use of two-by-two-inch Mylar® holders. This type of holder permits you to examine both sides of a coin and in such a manner that a fingerprint can not be left on the coin's surface.
Swish the coin in the distilled water, which will remove chlorine from tap water. Air dry the coin using the drying station. If distilled water was not used, gentlypat the coin dry. Make sure that coins are completely dry before storing them.