There are many ways to make money from new aerospace tech. Some ways are better than others.Valued at $5.8 billion and with more than $1.5 billion in cash, Archer Aviation (ACHR 0.60%) is the world's second largest builder in the nascent industry of air taxis -- smaller than Joby Aviation (JOBY 0.42%), but miles ahead of Vertical Aerospace or Lilium. That's quite impressive, considering Archer was only founded in 2018, compared to Joby, which established itself in 2009.But it's not enough to make Archer Avi ...