NO, if you buy shares you would still get the shares. A company's shares can still be traded without the cussip# that the DTCC dropped.
You can't trade (buy or sell) HRNF at many major brokerage houses because they use DTCC's continuous net settlement services (CNSS) to clear trades and provide custoday services. The restrictions and cusip # drop causes these borkerages to restrict or ban trading in securities like HRNF.
Co's like Vanguard use their own risk management, custody, or other clearing service, so they don't have the same restrictions.
Pagnano was recommending ZECCO. LOL Since the DTCC drop, I've seen Zecco ask for $200-$700 per trade commission for some securities cleared by Pension.