Of course but you need to have cash around in order to take advantage of them, think of the real estate crisis that happened on the US during 2008, at the time those that got a mortgage had to pay a huge amount of money for a house that was going down in value, but those that were smart enough to stay out of it and saved their money could buy the same house for half the price, so if you had the money you could have taken the opportunity to buy the best real estate for a fraction of its actual cost, and opportunities like that abound when there is an economic crisis, but you need to prepare yourself beforehand in order to take advantage of those opportunities.
Not exactly because few people can afford to pay for a house in cash no matter how much they save. Those who were able to take advantage of the 2008 crisis were the billionaires, either by buying cheap houses directly or through investment funds. And in this it makes little difference whether they were people who had a lot of money in the bank or were heavily indebted like Kiyosaki, who despite operating with a large debt took advantage of his debt capacity to buy even more.