Investment is not only for long term but also foe short term. If your bitcoin investment can give you huge profit in one year time, it is an investment. And it is also in other areas of investment. Example. In landed property. If I bought a land this year with the sum of $5, 000,000 for a plot and reaching next year that land has appreciated to $15,000,000, so it is a short term investment I should not sell it? No that is a good profit I have made from the land and sell it and buy again in another location. That is Bitcoin investment is also.
Bitcoin investment is not risky as trading as it was said by different people here and there.