Once they have a key, they can obtain and spend cryptocurrency. Without the key, the holder can’t spend or convert their cryptocurrency — rendering their holdings worthless unless and until the key is recovered.
— Jordan Barth is joining the Pew Charitable Trusts as a government relations associate. He was most recently the DNC’s voter protection hotline & research coordinator during the 2020 election.

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Both are leveraged products, meaning you only need to put up a small deposit – known as margin – to gain full exposure to the underlying market. Your profit or loss are still calculated according to the full size of your position, so leverage will magnify both profits and losses.