Securitize, a blockchain firm that tokenizes investments, is in talks to go public via a blank-check company started by Cantor Fitzgerald LP, according to people with knowledge of the matter.A merger with Cantor Equity Partners II Inc. would value Securitize at over $1 billion, said the people, asking not to be identified discussing private information. Deliberations are ongoing and Securitize could decide to remain private, the people said....