These companies are reaching key milestones.Cathie Wood is known for seizing opportunities. The founder of Ark Invest doesn't worry when one of the stocks she's invested in drops, and instead, she looks at the movement as a chance to increase her bet -- at a great price. This has worked out nicely for Wood and those invested in her flagship Ark Innovation fund, as it's climbed more than 80% over the past year.And here's another key component of Wood's strategy: She invests in exciting technology of the futu ...