The term "personal finance" generally refers to financial planning for an individual or family. This would encompass, for example, budgeting, financial recordkeeping, mortgages, credit, saving and investing, retirement and estate planning, insurance, and taxes.
"Paper gain" refers to unrealized gain on securities based on a comparison of current market price to original cost. It is a "paper gain" as opposed to a realized gain because the securities have not been sold. It is the theoretical gain as if the securities were immediately sold.