Analysts have warned cryptoassets such as bitcoin and ethereum could be in for a bout of volatility come Friday when nearly $2 billion-worth of options contracts expire, according to Forbes. The data, provided by Skew, suggests the level of options contracts has tripled in the past three months to $1.9 billion in total. Around $1 billion of this is focused on bitcoin alone, with many contracts set between $11,000 and $12,000, higher than bitcoin’s current dollar prices.