The account is built for money you want to grow over years, not weeks. It suits people with savings on deposit earning little, people who already use their pension relief and want to invest more, and parents and grandparents building a fund in their own name for a family goal.
Each person can hold one account, so a couple can hold two: up to €24,000 a year between them, with €100,000 inside the two tax-free thresholds. It does not suit money you may need soon. Keep an emergency fund in cash first.