Past few years I've seen more homeless on bikes. Inevitable result of declining incomes & rising housing prices. Localities everywhere in US (& internationally too) stoutly resist construction of low-cost housing 'cause they want residents with high incomes (more taxes) & low social costs ie childless college grads or wealthier retirees. In 60's homelessness was nearly non-existent in the US. I vividly remember an early 70's local TV news feature about a guy who lived in a box on DC's Capitol Hill: this was considered shocking.