Last 10 years:
Alphabet returned 8.9x
QQQ returned 6.6x
Given Alphabet's market cap, its upside may be relatively limited from here, whereas the law of large numbers doesn't apply to QQQ.
Therefore, would it be prudent to invest in Alphabet rather than QQQ, given that their x return over the next 10 years might be similar, and QQQ carries far less risk?