Neither crypocurrency nor virtual coins are legally "money"
Money is an officially-issued legal tender generally consisting of notes and coin, and is the circulating medium of exchange as defined by a government.
"Legal tender" means that, if I owe you a debt and we have not contracted a specific method of settling that debt, if I offer you "money" you must either accept it or waive the debt. If I offer you crypocurrency or virtual coins or chickens (and we have not contracted that that is an acceptable method of payment) you can tell me to go away and come back with "money".
Cryptocurrency is a speculative investment in an non-government backed, non legal-tender digital register - it is worth whatever someone is willing to pay you for it. Just like your car, your overcoat or the manuscript of your novel it is protected by the laws relating to property.
Virtual coins are a debt owed to you by the website owner, redeemable on the terms you agreed to in the contract (subject to any consumer protection laws). You have lent them "money" and the coins are the documentation of that loan. If they go out of business you would be an unsecured creditor and entitled to whatever the relevant bankruptcy law decides (usually nothing). Note that is no different to the money you lend your bank when you put it in a savings account except that banks are subject to greater prudential regulation and oversight than commercial website operators.