** Shares of cryptocurrency- and blockchain-related companies rise in premarket trading
** Bitcoin BTC=, the world's biggest cryptocurrency, gains 1.4%, while Ether ETH= rises 2.9% to $2,415.87
** A ceasefire between Israel-Iran spurred investor appetite for risky assets, helping global stocks and cryptocurrency
** Crypto exchange Coinbase Global COIN.O up 2.2%, while U.S.-listed shares of blockchain farm operator Bitfarms BITF.O rise 3.7%
** Crypto miners Riot Platforms Inc RIOT.O up 2.8%, MARA Holdings MARA.O rises 2.5%, Hut 8 HUT.O up 3.9%, and Bit Digital BTBT.O gains 1.5%
** BTC buyer Strategy MSTR.O gains 1.7%
** BTC mining machine maker Canaan Inc CAN.O up 2.7%
** ProShares Bitcoin Strategy ETF BITO.P, and iShares Bitcoin Trust ETF IBIT.O add 2% each
** BTC up 12.5% YTD, including session's moves