[SEALCOIN, a subsidiary of WISeKey, secures $4 million strategic investment to develop space economy blockchain infrastructure] According to MarketScreener, Nasdaq-listed company WISeKey International announced that its subsidiary SEALCOIN has secured a $4 million strategic investment, with participation from The Hashgraph Group (THG) and WISeKey. The new funding will be used to accelerate its integration into the rapidly growing space economy ecosystem and to build space economy blockchain infrastructure using Decentralized Physical Infrastructure Network (DePIN) technology.