Lilium's news today could be good news, but the context is concerning.Shares of German flying electric-car manufacturer Lilium N.V. (LILM 4.82%) took off in a blaze of glory this morning, shooting 15.4% higher (through 10 a.m. ET) after announcing that Floridian air-taxi company UbranLink will buy 20 of its all-electric vertical take-off and landing (eVTOL) Lilium Jets and take out an option to buy 20 more. The announcement comes just days after Lilium filed notice with the SEC that one of its shareholders ...